CHEMED CORP
SC 14D1, 1996-08-14
CHEMICALS & ALLIED PRODUCTS
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<PAGE>   1
 
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                 SCHEDULE 14D-1
                             TENDER OFFER STATEMENT
     (PURSUANT TO SECTION 14(d)(1) OF THE SECURITIES EXCHANGE ACT OF 1934)
 
                               ROTO-ROOTER, INC.
                           (NAME OF SUBJECT COMPANY)
 
                               CHEMED CORPORATION
                                    (BIDDER)
                            ------------------------
 
                    COMMON STOCK, PAR VALUE $1.00 PER SHARE
                         (TITLE OF CLASS OF SECURITIES)
 
                                    77878103
                    (CUSIP NUMBER OF CLASSES OF SECURITIES)
                            ------------------------
 
                             MR. KEVIN J. MCNAMARA
                               CHEMED CORPORATION
                               2600 CHEMED CENTER
                             255 EAST FIFTH STREET
                              CINCINNATI, OH 45202
(NAME, ADDRESS AND TELEPHONE NUMBER OF PERSONS AUTHORIZED TO RECEIVE NOTICES AND
                      COMMUNICATIONS ON BEHALF OF BIDDER)
                            ------------------------
 
                                    COPY TO:
                               RICHARD HALL, ESQ.
                            CRAVATH, SWAINE & MOORE
                                WORLDWIDE PLAZA
                               825 EIGHTH AVENUE
                               NEW YORK, NY 10019
                                 (212) 474-1000
 
                           CALCULATION OF FILING FEE
 
<TABLE>
<S>                                            <C>
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
            TRANSACTION VALUATION*                          AMOUNT OF FILING FEE
- ---------------------------------------------------------------------------------------------
                 $89,487,830                                      $17,898
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
</TABLE>
 
* For purposes of calculating amount of filing fee only. The amount assumes the
  purchase of 2,182,630 shares of Common Stock, par value $1.00 per share of
  Roto-Rooter, Inc., at $41.00 net in cash per share. The amount of the filing
  fee calculated in accordance with Regulation 240.0-11 of the Securities
  Exchange Act of 1934 equals 1/50 of 1% of the value of the shares to be
  purchased.
 
  / / Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
      and identify the filing with which the offsetting fee was previously paid.
      Identify the previous filing by registration statement number, or the Form
      or Schedule and the date of its filing.
 
<TABLE>
      <S>                                       <C>
      Amount Previously Paid: N/A               Filing Party: N/A
      Form or Registration No.: N/A             Date Filed: N/A
</TABLE>
 
                               Page 1 of 6 Pages
                            Exhibit Index on Page 6
 
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<PAGE>   2
 
CUSIP NO. 778786103                  14D-1
 
<TABLE>
<S>         <C>
- ----------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSONS
            S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS
            Chemed Corporation Tax ID# 31-0791746
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    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                           (a) / /
                                                                                       (b) /X/
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    3       SEC USE ONLY
- ----------------------------------------------------------------------------------------------
            SOURCES OF FUNDS
            WC
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    5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
            PURSUANT TO ITEMS 2(e) or 2(f)                                                 / /
- ----------------------------------------------------------------------------------------------
    6       CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
- ----------------------------------------------------------------------------------------------
    7       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
            PERSON
            2,990,333 Shares
- ----------------------------------------------------------------------------------------------
    8       CHECK IF THE AGGREGATE AMOUNT IN ROW (7)
            EXCLUDES CERTAIN SHARES                                                        / /
- ----------------------------------------------------------------------------------------------
    9       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7):
            None
- ----------------------------------------------------------------------------------------------
   10       TYPE OF REPORTING PERSON
            CO
- ----------------------------------------------------------------------------------------------
</TABLE>
 
                                        2
<PAGE>   3
 
     This Schedule 14D-1 Tender Offer Statement (the "Statement") relates to a
tender offer by Chemed Corporation, a Delaware corporation (the "Purchaser"), to
purchase any and all outstanding shares of Common Stock, par value $1.00 per
share, of Roto-Rooter, Inc., a Delaware corporation, at a price of $41.00 net in
cash per share, upon the terms and subject to the conditions set forth in the
Offer to Purchase dated August 14, 1996 of the Purchaser (the "Offer to
Purchase") and in the related Letter of Transmittal (collectively, the "Offer"),
and is intended to satisfy the reporting requirements of Section 14(d) of the
Securities Exchange Act of 1934, as amended. Copies of the Offer to Purchase and
the related Letter of Transmittal are filed as Exhibits (a)(1) and (a)(2)
hereto, respectively.
 
ITEM 1.  SECURITY AND SUBJECT COMPANY.
 
     (a) The name of the subject company is Roto-Rooter, Inc., a Delaware
corporation (the "Company"), which has its principal executive offices at 2500
Chemed Center, 255 E. Fifth Street, Cincinnati, Ohio 45202.
 
     (b) The title of the securities which are the subject of the Offer is the
Company's Common Stock, $1.00 par value (the "Shares"), at a price of $41.00 net
in cash per share. The offer is for any and all outstanding Shares. The
information concerning the number of outstanding Shares is set forth in
"Introduction" of the Offer to Purchase and is incorporated herein by reference.
 
     (c) The information set forth in "The Tender Offer -- Price Range of the
Shares; Dividends" of the Offer to Purchase is incorporated herein by reference.
 
ITEM 2.  IDENTITY AND BACKGROUND.
 
     (a)-(d) and (g) This Schedule 14D-1 is being filed by the Purchaser. The
information set forth in "The Tender Offer -- Certain Information Concerning the
Purchaser" of the Offer to Purchase is incorporated herein by reference.
 
     (e) and (f) During the last five years, neither the Purchaser nor any of
its executive officers or directors has been convicted in a criminal proceeding
(excluding traffic violations or similar misdemeanors) nor has been a party to a
civil proceeding of a judicial or administrative body of competent jurisdiction
as a result of which such person was or is subject to a judgment, decree or
final order enjoining future violations of, or prohibiting or mandating
activities subject to, Federal or state securities laws or finding any violation
of such laws.
 
ITEM 3.  PAST CONTACTS, TRANSACTION OR NEGOTIATIONS WITH THE SUBJECT COMPANY.
 
     (a) The information set forth in "Special Factors -- Interests of Certain
Persons; Stockholdings of Certain Officers and Directors; and Related
Transactions" of the Offer to Purchase is incorporated herein by reference.
 
     (b) The information set forth in "Special Factors -- Background to the
Offer" of the Offer to Purchase is incorporated herein by reference.
 
ITEM 4.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
 
     (a)-(b) The information set forth in "The Tender Offer -- Source and Amount
of Funds" of the Offer to Purchase is incorporated herein by reference.
 
     (c) Not applicable.
 
ITEM 5.  PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER.
 
     (a)-(e) The information set forth in "Special Factors -- Purpose and
Structure of the Offer; Plans for the Company After the Offer" of the Offer to
Purchase is incorporated herein by reference.
 
                                        3
<PAGE>   4
 
     (f) and (g) The information set forth in "Special Factors -- Purpose and
Structure of the Offer; Plans for the Company After the Offer" and "The Tender
Offer -- Certain Effects of the Offer" of the Offer to Purchase is incorporated
herein by reference.
 
ITEM 6.  INTEREST IN SECURITIES OF THE SUBJECT COMPANY.
 
     (a)-(b) The information set forth in "Special Factors -- Background to the
Offer" and "Special Factors -- Interests of Certain Persons; Stockholdings of
Certain Officers and Directors; Related Transactions" of the Offer to Purchase
and in Schedule I to the Offer to Purchase is incorporated herein by reference.
 
ITEM 7. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        THE SUBJECT COMPANY'S SECURITIES.
 
     The information set forth in Schedule I to the Offer to Purchase is
incorporated herein by reference.
 
ITEM 8.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.
 
     The information set forth in "Introduction", "Special Factors -- Opinion of
Financial Advisor" and in "The Tender Offer -- Fees and Expenses" of the Offer
to Purchase is incorporated herein by reference.
 
ITEM 9.  FINANCIAL STATEMENTS OF CERTAIN BIDDERS.
 
     The information set forth in "The Tender Offer -- Certain Information
Concerning the Purchaser" of the Offer to Purchase is incorporated herein by
reference.
 
ITEM 10.  ADDITIONAL INFORMATION.
 
     (a) None.
 
     (b) The information set forth in "The Tender Offer -- Certain Legal
Matters" of the Offer to Purchase is incorporated herein by reference.
 
     (c) Not applicable.
 
     (d) Not applicable.
 
     (e) None.
 
     (f) The information set forth in the Offer to Purchase and the Letter of
Transmittal, copies of which are attached hereto as Exhibits (a)(1) and (a)(2),
respectively, is incorporated herein by reference.
 
ITEM 11.  MATERIAL TO BE FILED AS EXHIBITS.
 
<TABLE>
    <S>      <C>
    (a)(1)   Offer to Purchase.
    (a)(2)   Letter of Transmittal.
    (a)(3)   Notice of Guaranteed Delivery.
    (a)(4)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other
             Nominees.
    (a)(5)   Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies
             and Other Nominees.
    (a)(6)   Guidelines for Certification of Taxpayer Identification Number on Substitute
             Form W-9.
    (a)(7)   Text of Press Release dated August 8, 1996, issued by the Purchaser.
    (a)(8)   Form of Summary Advertisement dated August 14, 1996.
    (b)      The Purchaser's Amended and Restated Credit Agreement dated as of June 30, 1996
             is filed as Exhibit 1 to the Purchaser's Quarterly Report on Form 10-Q for the
             quarter ended June 30, 1996, and is incorporated herein by reference.
    (c)      None.
    (d)      None.
    (e)      Not applicable.
    (f)      None.
</TABLE>
 
                                        4
<PAGE>   5
 
                                   SIGNATURE
 
     After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this Statement is true, complete and correct.
 
Dated: August 14, 1996
 
                                          CHEMED CORPORATION,
 
                                            by /s/  THOMAS C. HUTTON
                                             -----------------------------------
                                             Name: Thomas C. Hutton
                                             Title: Vice President
 
                                        5
<PAGE>   6
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
    EXHIBIT                                                                              PAGE
    NUMBER                                  EXHIBIT NAME                                NUMBER
    -------   ------------------------------------------------------------------------  ------
    <S>       <C>                                                                       <C>
    (a)(1)    Offer to Purchase
    (a)(2)    Letter of Transmittal
    (a)(3)    Notice of Guaranteed Delivery
    (a)(4)    Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other
              Nominees
    (a)(5)    Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust
              Companies and Other Nominees
    (a)(6)    Guidelines for Certification of Taxpayer Identification Number on
              Substitute Form W-9
    (a)(7)    Text of Press Release dated August 8, 1996, issued by the Purchaser
    (a)(8)    Form of Summary Advertisement dated August 14, 1996
</TABLE>
 
                                        6

<PAGE>   1
 
                           Offer To Purchase For Cash
 
                 Any And All Outstanding Shares Of Common Stock
 
                                       of
                               ROTO-ROOTER, INC.
                                       at
                              $41.00 NET PER SHARE
                                       by
                               CHEMED CORPORATION
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
     TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS EXTENDED.
 
                               ------------------
 
THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES OF COMMON STOCK
  OF ROTO-ROOTER, INC. ("SHARES") BEING TENDERED OR ON A VOTE BY THE HOLDERS
  OF SHARES OTHER THAN THE PURCHASER OR ON APPROVAL OF THE ROTO-ROOTER
     BOARD OR ANY COMMITTEE THEREOF. THE OFFER IS, HOWEVER, SUBJECT TO
      CERTAIN CONDITIONS. SEE "THE TENDER OFFER -- CERTAIN CONDITIONS OF
        THE OFFER". CHEMED CORPORATION CURRENTLY OWNS 2,990,333
          SHARES, REPRESENTING APPROXIMATELY 58% OF THE OUTSTANDING
           SHARES.
 
                               ------------------
 
                                   IMPORTANT
 
     Any stockholder desiring to tender any and all of such stockholder's Shares
should either (i) complete and sign the Letter of Transmittal (or facsimile
thereof) in accordance with the instructions in the Letter of Transmittal, have
such stockholder's signature thereon guaranteed if required by Instruction 1 to
the Letter of Transmittal, mail or deliver the Letter of Transmittal (or such
facsimile), or, in the case of a book-entry transfer effected pursuant to the
procedure set forth under "The Tender Offer -- Procedure for Tendering Shares",
an Agent's Message (as defined herein), and any other required documents to the
Depositary and either deliver the certificates for such Shares to the Depositary
along with the Letter of Transmittal (or facsimile thereof) or deliver such
Shares pursuant to the procedure for book-entry transfer set forth under "The
Tender Offer -- Procedure for Tendering Shares" or (ii) request such
stockholder's broker, dealer, commercial bank, trust company or other nominee to
effect the transaction for such stockholder. A stockholder having Shares
registered in the name of a broker, dealer, commercial bank, trust company or
other nominee must contact such broker, dealer, commercial bank, trust company
or other nominee if such stockholder desires to tender such Shares.
 
     If a stockholder desires to tender Shares and such stockholder's
certificates for Shares are not immediately available or the procedure for
book-entry transfer cannot be completed on a timely basis, or time will not
permit all required documents to reach the Depositary prior to the expiration of
the Offer, such stockholder's tender may be effected by following the procedure
for guaranteed delivery set forth under "The Tender Offer -- Procedure for
Tendering Shares".
 
     Questions and requests for assistance or for additional copies of this
Offer to Purchase, the Letter of Transmittal and the Notice of Guaranteed
Delivery may be directed to the Information Agent or to the Dealer Manager at
their respective addresses and telephone numbers set forth on the back cover of
this Offer to Purchase.
                               ------------------
 
     THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION (THE "COMMISSION") NOR HAS THE COMMISSION PASSED UPON THE
FAIRNESS OR MERITS OF SUCH TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF THE
INFORMATION CONTAINED IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS
UNLAWFUL.
                               ------------------
 
                      The Dealer Manager for the Offer is:
 
                                CS FIRST BOSTON
 
August 14, 1996
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
INTRODUCTION..........................................................................   1
SPECIAL FACTORS.......................................................................   3
  Background to the Offer.............................................................   3
  Purpose and Structure of the Offer; Plans for the Company After the Offer...........   7
  Interests of Certain Persons; Stockholdings of Certain Officers and Directors; and
     Related Transactions.............................................................   9
  Fairness of the Offer...............................................................   12
  Opinion of Financial Advisor........................................................   13
  Certain Federal Income Tax Consequences.............................................   17
  Appraisal Rights....................................................................   17
THE TENDER OFFER......................................................................   19
  Terms of the Offer..................................................................   19
  Procedure for Tendering Shares......................................................   20
  Withdrawal Rights...................................................................   23
  Acceptance for Payment and Payment..................................................   23
  Price Range of the Shares; Dividends................................................   25
  Certain Effects of the Offer........................................................   25
  Certain Information Concerning the Company..........................................   27
  Certain Information Concerning the Purchaser........................................   30
  Source and Amount of Funds..........................................................   32
  Dividends and Distributions.........................................................   32
  Certain Conditions of the Offer.....................................................   33
  Certain Legal Matters...............................................................   34
  Fees and Expenses...................................................................   36
  Miscellaneous.......................................................................   37
Schedule I -- Directors and Executive Officers of the Purchaser and Interests of Such
              Persons in the Company
Appendix A -- Opinion dated August 8, 1996 of CS First Boston Corporation
</TABLE>
<PAGE>   3
 
To the Holders of Common Stock
of Roto-Rooter, Inc.:
 
                                  INTRODUCTION
 
     Chemed Corporation, a Delaware corporation (the "Purchaser" or "Chemed"),
hereby offers to purchase any and all outstanding shares of Common Stock, par
value $1.00 per share (the "Shares"), of Roto-Rooter, Inc., a Delaware
corporation (the "Company" or "Roto-Rooter"), for a purchase price of $41.00 per
share (the "Offer Price"), net to the seller in cash, without interest thereon,
upon the terms and subject to the conditions set forth in this Offer to Purchase
and in the related Letter of Transmittal (which, together with any amendments or
supplements hereto or thereto, collectively constitute the "Offer").
 
     Chemed currently owns 2,990,333 Shares, representing approximately 58% of
the outstanding Shares. Accordingly, Chemed already has the power, subject to
any applicable duties under Delaware law, to elect the entire Board of Directors
of the Company (the "Roto-Rooter Board") or to approve a merger or other
business combination involving the Company without the affirmative vote of any
other stockholder. Such ownership, however, does not give Chemed the power to
compel any Company stockholder to accept the Offer.
 
     The Purchaser expects the Roto-Rooter Board to declare a dividend of $0.20
per Share to be paid in September 1996 to holders of record of Shares on a date
(the "Record Date") prior to the Expiration Date (the "Third Quarter Dividend").
Holders of record of the Shares on the Record Date will be entitled to receive
the Third Quarter Dividend whether or not they tender their Shares pursuant to
the Offer, and no adjustment will be made to the Offer Price or to any other
terms of the Offer as a result of the payment of the Third Quarter Dividend to
such stockholders.
 
     If, following consummation of the Offer, the Purchaser owns 90% or more of
the outstanding Shares, the Purchaser currently intends to have the Company
consummate a merger (the "Second Step Merger") with the Purchaser or a direct or
indirect wholly owned subsidiary of the Purchaser; however, no final decision
will be made by the Purchaser on the Second Step Merger until such time, if any,
as the Purchaser owns 90% or more of the outstanding Shares. See "Special
Factors -- Purpose and Structure of the Offer; Plans for the Company After the
Offer".
 
     If, following consummation of the Offer, the Purchaser owns less than 90%
of the Shares, the Purchaser reserves the right to purchase from time to time
additional Shares if market conditions permit. See "Special Factors -- Purpose
and Structure of the Offer, Plans for the Company After the Offer". The
Purchaser also reserves the right to propose a merger or other business
combination with the Company in the future, although, except as described in the
preceding paragraph, it does not have any current intention to do so. The
Purchaser also reserves the right to sell or otherwise dispose of all or a
portion of its Shares although it does not have any current intention to do so.
 
     For the reasons described below under "Special Factors -- Fairness of the
Offer", the Board of Directors of Chemed (the "Chemed Board") believes the Offer
is fair to holders of Shares other than Chemed.
 
     The Roto-Rooter Board has not yet taken a position with respect to the
Offer.
 
     THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING TENDERED
OR ON A VOTE BY THE HOLDERS OF SHARES OTHER THAN THE PURCHASER OR ON APPROVAL OF
THE ROTO-ROOTER BOARD OR ANY COMMITTEE THEREOF. THE OFFER IS, HOWEVER, SUBJECT
TO CERTAIN CONDITIONS. SEE "THE TENDER OFFER -- CERTAIN CONDITIONS OF THE
OFFER".
 
     According to the Company's Quarterly Report on Form 10-Q for the quarter
ended June 30, 1996 (the "Company's June 30 Form 10-Q"), filed with the
Commission, there were 5,172,963 Shares issued and outstanding as of August 13,
1996.
 
                                        1
<PAGE>   4
 
     Tendering stockholders will not be obligated to pay brokerage fees or
commissions or, except as set forth in Instruction 6 of the Letter of
Transmittal, transfer taxes on the purchase of Shares pursuant to the Offer. The
Purchaser will pay all fees and expenses of CS First Boston Corporation ("CS
First Boston"), which is acting as Dealer Manager (the "Dealer Manager"),
ChaseMellon Shareholder Services, L.L.C., which is acting as the Depositary (the
"Depositary"), and D.F. King & Co., Inc., which is acting as Information Agent
(the "Information Agent"), incurred in connection with the Offer. See "The
Tender Offer -- Fees and Expenses".
 
     THE OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION THAT SHOULD BE READ BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.
 
                                        2
<PAGE>   5
 
                                SPECIAL FACTORS
 
BACKGROUND TO THE OFFER
 
     Roto-Rooter was incorporated in Delaware on September 28, 1983, as a wholly
owned subsidiary of Chemed, and on August 31, 1984, succeeded to the business of
Chemed's Roto-Rooter Group. See "The Tender Offer -- Certain Information
Concerning the Company" and "The Tender Offer -- Certain Information Concerning
the Purchaser". In September 1984, Roto-Rooter sold in a private placement
transaction 719,991 Shares, and in June 1985, Chemed sold in a public offering
1,100,000 Shares (the "1985 Public Offering").
 
     Chemed has always beneficially owned over 50% of the outstanding Shares,
and therefore has always had the ability to elect the entire Roto-Rooter Board
or to approve a merger or other business combination involving the Company
without the affirmative vote of any other stockholder of the Company. Such
ownership, however, does not give Chemed the power to compel any Company
stockholder to accept the Offer. Since July 1985, Chemed has owned 2,990,333
Shares, which, based on the number of outstanding Shares reported in the
Company's June 30 Form 10-Q, represent approximately 58% of the outstanding
Shares. Currently, of the nineteen directors of Roto-Rooter, eleven are also
directors of Chemed, one is also a director emeritus of the Chemed Board and one
is an employee of Chemed. Edward L. Hutton, the Chairman of Roto-Rooter, is also
the Chairman and a director of Chemed; William R. Griffin, the President and
Chief Executive Officer of Roto-Rooter, is also an Executive Vice President and
a director of Chemed; James A. Cunningham, a director of Roto-Rooter, is also a
director of Chemed; Charles H. Erhart, Jr., a director of Roto-Rooter, is also a
director of Chemed; John M. Mount, a director of Roto-Rooter, is also a director
of Chemed; Thomas C. Hutton, a director of Roto-Rooter, is also a Vice President
and a director of Chemed; Sandra E. Laney, a director of Roto-Rooter, is also
the Chief Administrative Officer, Senior Vice President and a director of
Chemed; Kevin J. McNamara, the Vice Chairman of Roto-Rooter, is also the
President and a director of Chemed; Timothy S. O'Toole, a director of
Roto-Rooter, is also an Executive Vice President, the Treasurer and a director
of Chemed; D. Walter Robbins, Jr., a director of Roto-Rooter, is also a director
of Chemed; George J. Walsh III, a director of Roto-Rooter, is also a director of
Chemed; Neal Gilliatt, a director of Roto-Rooter, is also a director emeritus of
Chemed; and Naomi C. Dallob, the Secretary and General Counsel and a director of
Roto-Rooter, is also the Secretary and a Vice President of Chemed. In addition,
Will J. Hoekman, a director of Roto-Rooter, is also a director of National
Sanitary Supply Company (an 84% owned subsidiary of Chemed) and Donald E.
Saunders, a director of Roto-Rooter, was an employee for 25 years of DuBois
Chemicals, Inc., formerly a wholly-owned subsidiary of Chemed. Certain of
Chemed's executive officers and directors beneficially own Shares and options to
acquire Shares. Schedule I to this Offer to Purchase sets forth the amount and
nature of such beneficial ownership for each such person. For further
information concerning Chemed's interests in Roto-Rooter, see "Interests of
Certain Persons; Stockholdings of Certain Officers and Directors; and Related
Transactions" below.
 
     On several occasions during the years following the 1985 Public Offering,
Mr. E. L. Hutton discussed with Roto-Rooter executives the possibility of Chemed
acquiring 100% of the outstanding Shares. All these discussions took place as
part of Chemed's long-term strategic planning process and were prompted by Mr.
E. L. Hutton's concern that the marketplace appreciation of the Shares had not
kept pace with the underlying growth rate of Roto-Rooter's business. None of
these discussions were intended or understood by either party to be definitive
proposals or indications of interest that required or received consideration or
action by the Roto-Rooter Board or the Chemed Board.
 
     In January 1995, the Shares were trading at prices as low as $19.25 per
share, which was within the range of the prices per Share at which the Shares
were trading immediately following the 1985 Public Offering. Chemed's management
became concerned that the low Roto-Rooter stock price was significantly and
adversely affecting the stock market valuation of Chemed, and Chemed's
management began general consideration of various strategic alternatives with
respect to Chemed's investment in Roto-Rooter. By May, 1995, Chemed's management
had concluded that an acquisition by Chemed of the minority interest in Roto-
Rooter should be explored. Primarily because Chemed did not have sufficient
funds available at that time to purchase all the outstanding Shares for cash,
Chemed's management decided that any proposed transaction
 
                                        3
<PAGE>   6
 
would have to be structured as a stock-for-stock merger whereby Shares would be
exchanged for shares of Chemed's capital stock, $1.00 par value (the "Chemed
Shares"), at a to-be-agreed upon exchange ratio. Chemed retained CS First Boston
to act as its exclusive financial advisor and Chemed's management met with CS
First Boston, as well as Chemed's legal advisers, on several occasions in early
May to discuss how to structure a proposal and to value the Shares.
 
     On May 15, 1995, at a meeting of the Chemed Board, Mr. E. L. Hutton
proposed that Chemed actively investigate a potential transaction in which
Chemed would acquire 100% of the outstanding Shares. Mr. E. L. Hutton explained
to the Chemed Board that: (a) during the previous four years the thinly traded
Shares had not performed as well as Roto-Rooter's operating results, which was
having an adverse impact on Chemed's own market valuation; (b) such an
acquisition would enable Chemed to fully integrate Roto-Rooter, one of its most
significant assets, with Chemed's other operations; (c) Chemed would be able to
consolidate for tax purposes Roto-Rooter's results of operations; (d) such an
acquisition would reduce the administrative expense associated with operating
two public companies; and (e) if the transaction were structured as a
stock-for-stock deal, it would enhance Chemed's balance sheet and
creditworthiness. After deliberation, the Chemed Board designated John Mount,
one of its members, to work with Chemed's financial and legal advisors to
attempt to negotiate and structure a transaction with Roto-Rooter. Because a
stock-for-stock merger would require the approval of the Roto-Rooter Board and,
if voted for by Chemed, could be consummated without action of any other holder
of Shares and because of the conflicts of interest for a majority of the
Roto-Rooter directors, the Chemed Board recommended to the Roto-Rooter Board
that it consider creating a special committee to negotiate with Chemed the terms
of any transaction.
 
     Immediately following the Chemed Board meeting described above, a meeting
of the Roto-Rooter Board was held. At that meeting, Mr. Kevin J. McNamara (who
is Vice Chairman of the Roto-Rooter Board) informed the other Roto-Rooter
directors that the Chemed Board had approved Chemed's management commencing
negotiations with Roto-Rooter with respect to a stock-for-stock merger. Mr.
McNamara also informed the Roto-Rooter Board that any proposal would be
conditioned upon the approval of a special committee of the Roto-Rooter Board
and proposed that the Roto-Rooter Board establish such a special committee.
Chemed did not propose any exchange ratio at that time. The Roto-Rooter Board
designated Messrs. Will J. Hoekman and Jerome Schnee to serve as the special
committee (the "Special Committee") and directed the Special Committee to select
and retain independent legal and financial advisors to assist it in negotiating
the terms of any transaction with Chemed. Over the next several weeks the
Special Committee retained Kirkland & Ellis as its legal advisor and Goldman
Sachs & Co. ("Goldman") as its financial advisor.
 
     During the months of May and June, Goldman and CS First Boston conducted
several due diligence sessions with Chemed's management and Roto-Rooter's
management.
 
     On July 6, 1995, CS First Boston, on behalf of Chemed, proposed an exchange
ratio of 0.775 to 0.825 Chemed Shares for each Share, which, based on a $34.75
closing price for Chemed Shares on July 5, 1995, would have represented a price
per Share of $26.93 to $28.67, compared to a closing bid price of $28.00 per
Share on July 5, 1995 (the "Initial Proposal"). The Initial Proposal was not
conditioned on the approval of holders of a majority of the Shares not held by
Chemed. On July 17, 1995, Goldman informed CS First Boston that the Initial
Proposal was insufficient for the Special Committee to commence discussions with
Chemed concerning the proposed transaction. On July 26, CS First Boston, after
consultation with Chemed's management, and on behalf of Chemed, proposed to
Goldman that the proposed exchange ratio be increased to 0.9 Chemed Shares for
each Share, which, based on a $33.63 closing price for Chemed Shares on July 25,
1995, would have represented a price per Share of $30.26 compared to a closing
bid price of $29.50 per Share on July 25, 1995 (the "Second Proposal"). The
Second Proposal also was not conditioned on the approval of holders of a
majority of the Shares not held by Chemed. The Special Committee was also
unwilling to meet to discuss the Second Proposal with Chemed. On July 28, 1995,
Chemed, after consultation with CS First Boston, (a) increased the proposed
exchange ratio to 0.925 Chemed Shares for each Share plus $2.50 in cash, which,
based on a $34.13 closing price for Chemed Shares on July 27, 1995, would have
represented a price per Share of $34.07 compared to a closing bid price of
$29.75 per Share on July 27, 1995, and (b) made the proposed transaction
conditioned on the approval of holders of a majority of the Shares not held by
Chemed (the "Third Proposal"). CS First Boston informed Goldman that
 
                                        4
<PAGE>   7
 
if no mutually acceptable agreement was reached by 4:00 p.m. on July 31, 1995,
Chemed's management would abandon the proposed transaction.
 
     On July 31, 1995, the Special Committee contacted Chemed and stated that
the Third Proposal was unacceptable. The Special Committee indicated that it
would approve a transaction based upon per Share consideration of one Chemed
Share plus $4.25 in cash (which, based on a $34.00 closing price for Chemed
Shares on July 28, 1995, would have represented a price per Share of $38.25
compared to a closing bid price of $29.75 per Share on July 28, 1995), if, in
addition, Chemed agreed (a) to adjust the exchange ratio (a "Collar") in the
event the Chemed Share price fell prior to the closing of the transaction, (b)
to continue to pay its dividend for an unspecified period, (c) to not sell
Roto-Rooter to a third party for a specified period and (d) to continue its
stock buy-back program (the "First Counter-Proposal"). That afternoon, Chemed's
management rejected the First Counter-Proposal, primarily because of the
presence of the Collar, and informed the Special Committee that it would
increase the proposed exchange ratio (without a Collar) to 1.05 Chemed Shares
for each Share, which, based on a $34.00 closing price for Chemed Shares on July
28, 1995, would have represented a price per Share of $35.70 compared to a
closing bid price of $29.75 per Share on July 28, 1995 (the "Final Proposal").
That evening, the Special Committee rejected the Final Proposal and proposed an
exchange ratio of one Chemed Share plus $4.00 cash for each Share, which, based
on a $33.75 closing price for Chemed Shares on July 31, 1995, would have
represented a price per Share of $37.75 compared to a closing bid price of
$30.00 per Share on July 31, 1995 (the "Second Counter-Proposal"). The Second
Counter-Proposal was also conditioned upon the existence of a Collar. Later that
evening, Chemed rejected the Second Counter-Proposal, primarily because of the
presence of the Collar, and informed the Special Committee that, because a
mutually agreeable transaction could not be accomplished at that time, Chemed
was terminating the negotiations. On August 1, 1995, Chemed issued a press
release stating that discussions with Roto-Rooter with respect to a possible
transaction had been terminated without any agreement having been reached. On
August 2, 1995, at a meeting of the Roto-Rooter Board, the Roto-Rooter Board
formally dissolved the Special Committee. At that meeting, Mr. McNamara read
through a written chronology of the events relating to the proposed transaction
(from which the above description of events was prepared) and confirmed that
none of the other Roto-Rooter directors, including the members of the Special
Committee, had any comments thereon. In connection with Roto-Rooter's 1996
annual meeting of stockholders, Mr. Schnee was not nominated for re-election as
a director of Roto-Rooter.
 
     In December 1995, Mr. Tim Ebright at Liberty Investment Management
("Liberty"), then the third largest Roto-Rooter stockholder, telephoned Mr.
McNamara to ask whether Chemed would still be interested in acquiring Liberty's
Shares in exchange for Chemed Shares at the exchange ratio that Chemed proposed
to the Special Committee in its Final Proposal. Mr. McNamara informed Liberty
that Chemed was not interested in such a transaction.
 
     In January 1996, at the request of Chemed's management, CS First Boston
contacted Mr. Kurt Moser at State Farm Mutual Automobile Insurance Company
("State Farm"), then the second largest Roto-Rooter stockholder, about whether
he would be willing to meet with a representative of Chemed management to
discuss a possible sale to Chemed of the Shares held by State Farm. Mr. Moser
indicated that he would consider meeting at a later date. In March 1996, Mr.
McNamara spoke with Mr. Moser to schedule a meeting with him to discuss whether
State Farm had any interest in selling its Shares. Mr. Moser said he was willing
to meet with Mr. McNamara but was not interested at that time in a
stock-for-stock transaction. No other conversations with State Farm took place
until August 1, 1996 and no proposals were made to, or commitments sought or
obtained from, State Farm.
 
     Chemed's management did not devote significant time between December 1995
and March 1996 to consider the acquisition of the outstanding Shares, primarily
because it was involved in other business matters. However, Chemed's management
had not lost interest in acquiring additional Shares and in April 1996 began to
investigate whether a cash tender offer for the outstanding Shares would be
feasible. This was prompted in part by their belief that State Farm would be
interested in selling its Shares to Chemed in an all cash transaction. Moreover,
in contrast to 1995, by April 1996 Chemed expected to have adequate funding
available to pursue an all cash transaction.
 
                                        5
<PAGE>   8
 
     On August 1, 1996, Mr. McNamara telephoned Mr. Moser at State Farm to
arrange a meeting with him to discuss State Farm's possible interest in selling
its Shares. Mr. McNamara mentioned that Chemed's management was considering
increasing Chemed's ownership interest in the Company and was exploring methods
by which to do so. Mr. Moser asked whether, among other things, Chemed would
consider making a cash tender offer for the Shares. Mr. McNamara said that a
cash tender offer was among the range of possibilities being considered. No
subsequent conversations between any persons at Chemed and State Farm took place
on or prior to the date of this Offer to Purchase.
 
     On Wednesday, August 7, 1996, at a regularly scheduled Chemed Board
meeting, Mr. McNamara proposed that Chemed make the Offer. Chemed's management
then discussed with the Chemed Board the Offer and why Chemed's management
believed that Chemed should make the Offer. Chemed's legal advisors then
discussed with the Chemed directors certain legal issues arising out of the
Offer and certain possible consequences of the Offer. Finally, CS First Boston
made a presentation to the Chemed Board with respect to its financial analysis
of Roto-Rooter and the Offer and delivered its oral opinion to the Chemed Board
that, as of August 7, 1996, the cash consideration to be received by the
stockholders of Roto-Rooter pursuant to the Offer was fair to such stockholders
other than Chemed from a financial point of view. See "-- Opinion of Financial
Advisor" below. The Chemed Board then considered the fairness of the Offer to
the Roto-Rooter stockholders other than Chemed, and concluded that the Offer was
fair to such holders. See "-- Fairness of the Offer" below for a discussion of
the factors considered by the Chemed Board in reaching its fairness decision.
After deliberation, the Chemed Board, with one abstention, approved going
forward with the Offer. Mr. Griffin abstained from voting with respect to the
approval by the Chemed Board of the Offer because of potential conflicts arising
out of his position as President and Chief Executive Officer of Roto-Rooter.
 
     Immediately following the conclusion of the Chemed Board meeting, the
Roto-Rooter Board commenced a regularly scheduled meeting. Mr. McNamara informed
the Roto-Rooter Board that the Chemed Board had just approved going forward with
the Offer. A copy of the press release that Chemed intended to issue the next
day was distributed to the Roto-Rooter directors. Mr. McNamara informed the
Roto-Rooter Board that, because of the conflict of interest that exists for
himself and the other members of the Roto-Rooter Board who are also directors or
employees of Chemed, the fact that the Offer would not be conditioned upon the
approval of the Roto-Rooter Board (or any committee thereof) and the fact that
Chemed's intention to make the Offer would not be disclosed publicly until the
next day, they did not wish at that time to answer any questions that the other
Roto-Rooter directors may have had concerning the Offer, beyond what was in
Chemed's press release. For that reason, and in light of the fact that the
Roto-Rooter Board was not required to take any position regarding the Offer
until ten business days after Chemed officially commenced the Offer, Mr.
McNamara suggested that the Roto-Rooter Board not discuss the Offer at that
meeting. Although the Offer assumes that the Third Quarter Dividend will be paid
to Roto-Rooter stockholders, Mr. McNamara also suggested that the Roto-Rooter
Board defer consideration of the Third Quarter Dividend to avoid the need to
issue a Roto-Rooter press release describing the Roto-Rooter Board's reaction to
the Offer. The Roto-Rooter Board, by the unanimous vote of all Roto-Rooter
directors present, adjourned consideration of the Offer and the Third Quarter
Dividend until later in August 1996.
 
     Prior to the opening of business on August 8, 1996, Chemed issued a press
release announcing its intention to commence the Offer.
 
     On August 8, 1996, Mr. Ebright at Liberty informed Mr. McNamara that
Liberty had sold all its Shares in open market transactions.
 
     On August 8, 1996, Mr. Griffin approached Mr. McNamara and indicated that
he thought it would be appropriate for the Roto-Rooter Board to retain legal
counsel to advise it in responding to the Offer and also requested Mr.
McNamara's assistance in retaining an appropriate law firm to provide such
advice. On August 12, 1996, Mr. Griffin asked Mr. McNamara to convene a
Roto-Rooter Board meeting during the following week to discuss retaining legal
counsel to represent the Roto-Rooter Board in connection with the Offer and to
discuss the response of the Roto-Rooter Board to the Offer. Mr. McNamara said
that he would arrange such a meeting for Tuesday, August 20, 1996.
 
                                        6
<PAGE>   9
 
PURPOSE AND STRUCTURE OF THE OFFER; PLANS FOR THE COMPANY AFTER THE OFFER
 
     Purpose.  The purpose of the Offer is to increase the Purchaser's ownership
interest in the Company for the following reasons:
 
          (1) As a result of recent financial performance, the Purchaser has
     surplus cash available to invest in its business. The Purchaser believes
     that the Shares represent a good investment because the Purchaser is very
     familiar with the operations of the Company and that the Company is an
     attractive asset to own in the long term. The Purchaser therefore views any
     increase in its ownership interest in the Company as a worthwhile
     investment.
 
          (2) The Purchaser wants to ensure that its ownership interest in the
     Company remains at a sufficient level above 50% so that it is able to
     consolidate the Company's financial statements with its financial
     statements (which the Purchaser can only do if it owns more than 50% of the
     outstanding Shares and controls the Company). Since the 1985 Public
     Offering, the Purchaser's ownership interest in the Company has decreased
     from approximately 62% to the current 58% level due to Company employees
     exercising their stock options over the past years. Although the Purchaser
     is currently able to meet the financial consolidation requirements, it
     would prefer having a larger ownership interest in the Company in order to
     ensure that it will be able to meet such requirements in the future as more
     employee stock options are exercised.
 
          (3) Over the past few years, the Purchaser's management has been
     spending more time on Company-related matters because the Company
     represents a substantial portion of the Purchaser's total business
     operations. Currently, the amount of time that Purchaser's management is
     spending on Company-related matters is disproportionate to the size of its
     investment. Therefore, the Purchaser would like to increase its investment
     in the Company to more appropriately reflect such management involvement.
 
     In addition to the foregoing factors, if sufficient Shares are properly
tendered and purchased in accordance with the terms of the Offer, the Purchaser
will be able to include the Company in the consolidated Federal income tax
return of the Purchaser as a member of the Purchaser's affiliated group. Section
1504(a)(2) of the Internal Revenue Code of 1986, as amended (the "Code"),
requires generally that 80% or more of both the total voting power and the total
value of the stock of a corporation (other than certain preferred stock) be
owned by one or more of the members of an "affiliated group" in order for such
corporation to be included within such group and thereby join in the filing of
consolidated Federal income tax returns of such group. See "The Tender
Offer -- Certain Effects of the Offer" with respect to the Federal income tax
sharing agreement that the Purchaser intends to seek to enter into with the
Company in such event.
 
     Structure.  The Offer is structured so that no approval of the unaffiliated
stockholders of the Company or of a special committee of the Roto-Rooter Board
is required or being sought. The Purchaser will, subject to the conditions of
the Offer, accept for payment tendered Shares regardless of the amount tendered.
In August 1996, the Purchaser again considered whether to propose a transaction
in which holders of Shares would receive Chemed Shares, as had been proposed in
May 1995 (see "-- Background to the Offer" above). The Purchaser concluded,
based in part upon discussions with State Farm, that an all-cash transaction
would be more likely to be attractive to the holders of Shares than a
transaction in which Chemed Shares were offered in consideration. The Purchaser
also concluded that a cash tender offer could be consummated more quickly than a
transaction involving consideration in the form of securities. The Purchaser
evaluated proposing a merger transaction for cash, which would have required
approval by the Roto-Rooter Board and a vote of the Company's stockholders and
would have resulted in either none of or all the holders of Shares other than
the Purchaser selling for cash. The Purchaser decided to proceed with a tender
offer, rather than a merger transaction, primarily because the Purchaser wished
to allow each holder of Shares to be free to make his or her own decision with
respect to whether or not to accept the price offered by the Purchaser, because
a cash tender offer could be consummated more quickly than a merger transaction
requiring a vote of the Company's stockholders and due to the conflicts of
interest that would be raised if the Roto-Rooter Board acted on a merger
agreement.
 
                                        7
<PAGE>   10
 
     Plans for the Company After the Offer.  If, following consummation of the
Offer, the Purchaser owns 90% or more of the outstanding Shares, the Purchaser
currently intends to have the Company consummate the Second Step Merger, which
would not require the approval of any holder of Shares or of the Roto-Rooter
Board; however, no final decision will be made by the Purchaser on the Second
Step Merger until such time, if any, as the Purchaser owns 90% or more of the
outstanding Shares. The purpose of the Second Step Merger would be to acquire
all Shares not tendered and purchased pursuant to the Offer or otherwise.
Pursuant to the Second Step Merger, each then outstanding Share (other than
Shares owned by the Purchaser, Shares held in the treasury of the Company and
Shares owned by stockholders who perfect any available appraisal rights under
the Delaware General Corporation Law (the "DGCL")) would be converted into the
right to receive an amount in cash equal to the highest price per Share paid
pursuant to the Offer. See "-- Appraisal Rights" below. The Purchaser will need
to purchase approximately 1,665,334 Shares pursuant to the Offer to reach the
90% ownership level necessary to effect the Second Step Merger. This represents
approximately 32% of the outstanding Shares and approximately 76% of the
outstanding Shares not currently owned by the Purchaser.
 
     If the Second Step Merger is consummated, the Purchaser will (i) have the
Shares delisted from the Nasdaq National Market System (the "Nasdaq National
Market") operated by the National Association of Security Dealers, Inc. (the
"NASD") and (ii) terminate the registration of the Shares under the Securities
Exchange Act of 1934 (the "Exchange Act").
 
     If, following consummation of the Offer, the Purchaser owns less than 90%
of the outstanding Shares, the Purchaser reserves the right to purchase from
time to time additional Shares, if market conditions permit and subject to the
availability of funds and other investment opportunities. Such purchases may be
made through the open market, privately negotiated purchases, another tender
offer, an exchange offer or otherwise, subject, in each case, to market
conditions, at prices which may be greater or less than the Offer Price. There
can be no assurance that the Purchaser will acquire such additional Shares in
such circumstances or over what period of time such additional Shares, if any,
might be acquired. Any acquisition of Shares by the Purchaser would have to be
made in accordance with applicable legal requirements, including those of
Regulation 13D-G and Rules 10b-18 and 13e-3 under the Exchange Act. The
Purchaser also reserves the right to propose a merger or other business
combination with the Company in the future, although, except as described in the
second preceding paragraph, it does not have any current intention to do so.
After completion or termination of the Offer, the Purchaser also reserves the
right, but has no current intention, to sell Shares in open market or negotiated
transactions.
 
     Unless the Second Step Merger is consummated, the Purchaser currently does
not intend to propose or seek to have the Shares delisted from the Nasdaq
National Market or to terminate the registration of the Shares under the
Exchange Act. However, delisting of the Shares may still occur at the
instigation of the NASD due to the reduced number of Shares or holders thereof
then outstanding. If the Shares cease to be registered under the Exchange Act,
the Company, among other things, would no longer have to comply with the
Exchange Act's proxy rules. See "The Tender Offer -- Certain Effects of the
Offer".
 
     Except as otherwise described in this Offer to Purchase, the Purchaser has
no current plans or proposals which relate to or would result in: (a) an
extraordinary corporate transaction, such as a merger, reorganization or
liquidation involving the Company or any of its subsidiaries; (b) a sale or
transfer of a material amount of assets of the Company or any of its
subsidiaries; (c) any change in the present board of directors or management of
the Company, including, but not limited to, any plan or proposal to change the
number or term of directors, to fill any existing vacancy on the Roto-Rooter
Board or to change any material term of the employment contract of any executive
officer; (d) any material change in the present dividend rate or policy or
indebtedness or capitalization of the Company; (e) any other material change in
the Company's corporate structure or business; (f) a class of equity securities
of the Company becoming eligible for termination of registration pursuant to
Section 12(g)(4) of the Exchange Act; or (g) the suspension of the Company's
obligation to file reports pursuant to Section 15(d) of the Exchange Act.
 
                                        8
<PAGE>   11
 
INTERESTS OF CERTAIN PERSONS; STOCKHOLDINGS OF CERTAIN OFFICERS AND DIRECTORS;
AND RELATED TRANSACTIONS
 
     Directors and Officers.  As described under "-- Background to the Offer"
above, currently, of the nineteen directors of the Company, eleven are also
directors of Chemed, one is also a director emeritus of the Chemed Board and one
is an employee of Chemed. Edward L. Hutton, the Chairman of Roto-Rooter, is also
the Chairman, Chief Executive Officer and a director of Chemed; William R.
Griffin, the President and Chief Executive of Roto-Rooter, is also an Executive
Vice President and a director of Chemed; James A. Cunningham, a director of
Roto-Rooter, is also a director of Chemed; Charles H. Erhart, Jr., a director of
Roto-Rooter, is also a director of Chemed; John M. Mount, a director of
Roto-Rooter, is also a director of Chemed; Thomas C. Hutton, a director of
Roto-Rooter, is also a Vice President and a director of Chemed; Sandra E. Laney,
a director of Roto-Rooter, is also the Chief Administrative Officer, Senior Vice
President, and a director of Chemed; Kevin J. McNamara, the Vice Chairman of
Roto-Rooter, is also the President and a director of Chemed; Timothy S. O'Toole,
a director of Roto-Rooter, is also an Executive Vice President, Treasurer and a
director of Chemed; D. Walter Robbins, Jr., a director of Roto-Rooter, is also a
director of Chemed; George J. Walsh III, a director of Roto-Rooter, is also a
director of Chemed; Neal Gilliatt, a director of Roto-Rooter, is also a director
emeritus of Chemed; and Naomi C. Dallob, the Secretary and General Counsel and a
director of Roto-Rooter, is also the Secretary and a Vice President of Chemed.
In addition, Will J. Hoekman, a director of Roto-Rooter, is also a director of
National Sanitary Supply Company (an 84% owned subsidiary of Chemed) and Donald
E. Saunders, a director of Roto-Rooter, was an employee for 25 years of DuBois
Chemicals, Inc., formerly a wholly-owned subsidiary of Chemed. Certain of the
Purchaser's executive officers and directors beneficially own Shares and options
to acquire Shares. Schedule I to this Offer to Purchase sets forth the amount
and nature of such beneficial ownership.
 
     Throughout 1995 each member of the Roto-Rooter Board who was not a regular
employee of the Company or a wholly owned subsidiary of the Company was entitled
to be paid directors' fees. Accordingly, executive employees of the Purchaser
who are directors of the Company (other than Mr. E. L. Hutton) are entitled to
receive directors' fees for attending Roto-Rooter Board and committee meetings.
Each member of the Roto-Rooter Board entitled to receive directors' fees was
paid $1,000 for his attendance at each meeting of the Roto-Rooter Board and $550
for each meeting of a committee he attended. The chairman of each committee was
paid $600. Effective February 7, 1996, the directors' fees were increased and
each member of the Roto-Rooter Board who is not a regular employee of the
Company or of a wholly owned subsidiary of the Company (other than Mr. E. L.
Hutton) is now paid $1,075 for his attendance at each meeting of the Roto-Rooter
Board and $600 for each meeting of a committee of the Roto-Rooter Board he
attended. The chairman of each committee is paid $675. The following directors
who are members of the Incentive Committee of either the Company or an
affiliated company also receive an additional annual fee of $4,700: Messrs.
Cunningham, Erhart, Gilliatt, Hoekman and Robbins. Members of the Roto-Rooter
Board are reimbursed for reasonable travel expenses incurred in connection with
such meetings. On May 15, 1995, and May 20, 1996, each then member of the
Roto-Rooter Board (other than those serving on the Incentive Committee of either
the Company or an affiliated company) was granted an unrestricted stock award
covering 75 Shares under the Company's stock incentive plans. Those directors
who are members of the Incentive Committee of either the Company or an
affiliated company were paid the cash equivalent of the 75 Share stock award
($2,050 in 1995 and $2,512 in 1996). Mr. Cunningham received an aggregate of
$7,100 for his attendance at six Roto-Rooter Board meetings and four committee
meetings in 1993, $5,725 for his attendance at five Roto-Rooter Board meetings
and two committee meetings in 1994, $5,600 for his attendance at five
Roto-Rooter Board meetings and one committee meeting in 1995, and $4,975 for his
attendance at four Roto-Rooter Board meetings and one committee meeting in 1996;
Ms. Dallob received an aggregate of $2,550 for her attendance at three
Roto-Rooter Board meetings in 1993, $4,625 for her attendance at five
Roto-Rooter Board meetings in 1994, $5,000 for her attendance at five
Roto-Rooter Board meetings in 1995, and $4,300 for her attendance at four
Roto-Rooter Board meetings in 1996; Mr. Erhart received an aggregate of $8,900
for his attendance at six Roto-Rooter Board meetings and eight committee
meetings in 1993, $6,725 for his attendance at five Roto-Rooter Board meetings
and four committee meetings in 1994, $7,950 for his attendance at five
Roto-Rooter Board meetings and five committee meetings in 1995, and $6,925 for
his attendance at four Roto-Rooter Board meetings and four committee meetings in
1996; Mr. Gilliatt received an aggregate of $6,950 for his attendance at five
Roto-Rooter Board meetings and six
 
                                        9
<PAGE>   12
 
committee meetings in 1993, $5,200 for his attendance at four Roto-Rooter Board
meetings and three committee meetings in 1994, $8,300 for his attendance at five
Roto-Rooter Board meetings and six committee meetings in 1995, and $7,300 for
his attendance at four Roto-Rooter Board meetings and five committee meetings in
1996; Mr. Hoekman received an aggregate of $7,900 for his attendance at six
Roto-Rooter Board meetings and six committee meetings in 1993, $6,725 for his
attendance at five Roto-Rooter Board meetings and four committee meetings in
1994, $5,750 for his attendance at four Roto-Rooter Board meetings and three
committee meetings in 1995, and $6,250 for his attendance at four Roto-Rooter
Board meetings and three committee meetings in 1996; Mr. T.C. Hutton received an
aggregate of $6,900 for his attendance at six Roto-Rooter Board meetings and
four committee meetings in 1993, $5,625 for his attendance at five Roto-Rooter
Board meetings and two committee meetings in 1994, $7,200 for his attendance at
five Roto-Rooter board meetings and four committee meetings in 1995, and $6,100
for his attendance at four Roto-Rooter Board meetings and three committee
meetings in 1996; Ms. Laney received an aggregate of $6,900 for her attendance
at six Roto-Rooter Board meetings and four committee meetings in 1993, $5,625
for her attendance at five Roto-Rooter Board meetings and two committee meetings
in 1994, $7,200 for her attendance at five Roto-Rooter Board meetings and four
committee meetings in 1995, and $6,100 for her attendance at four Roto-Rooter
Board meetings and three committee meetings in 1996; Mr. McNamara received an
aggregate of $6,000 for his attendance at six Roto-Rooter Board meetings and two
committee meetings in 1993, $5,625 for his attendance at five Roto-Rooter Board
meetings and two committee meetings in 1994, $6,100 for his attendance at five
Roto-Rooter Board meetings and two committee meetings in 1995, and $5,500 for
his attendance at four Roto-Rooter Board meetings and two committee meetings in
1996; Mr. Mount received an aggregate of $2,150 for his attendance at two
Roto-Rooter Board meetings in 1996; Mr. O'Toole received an aggregate of $5,100
for his attendance at six Roto-Rooter Board meetings in 1993, $4,625 for his
attendance at five Roto-Rooter Board meetings in 1994, $5,000 for his attendance
at five Roto-Rooter Board meetings in 1995, and $4,300 for his attendance at
four Roto-Rooter Board meetings in 1996; Mr. Robbins received an aggregate of
$6,000 for his attendance at six Roto-Rooter Board meetings and two committee
meetings in 1993, $5,625 for his attendance at five Roto-Rooter Board meetings
and two committee meetings in 1994, $6,100 for his attendance at five
Roto-Rooter Board meetings and two committee meetings in 1995, and $5,500 for
his attendance at four Roto-Rooter Board meetings and two committee meetings in
1996; Mr. Saunders received an aggregate of $2,150 for his attendance at two
Roto-Rooter Board meetings in 1996; Mr. Walsh received an aggregate of $2,150
for his attendance at two Roto-Rooter Board meetings.
 
     Security Ownership.  The Purchaser currently owns 2,990,333 Shares,
representing approximately 58% of the outstanding Shares. See "-- Background to
the Offer" above. According to the Company's April 8, 1996 Proxy Statement (the
"1996 Proxy Statement"), the only holder of 5% or more of the Shares, other than
the Purchaser, was State Farm, which, as of April 8, 1996, owned, 453,066
Shares, or approximately 9% of the outstanding Shares on May 7, 1996. Under the
Company's Retirement and Savings Plan (the "Retirement and Savings Plan"), as of
June 30, 1996, NationsBank, as trustee under the Retirement and Savings Plan
(the "Plan Trustee"), held 152,848 Shares on behalf of the 1,304 to 1,092 active
participants and 212 terminated participants with vested interests in the
Retirement and Savings Plan. Employees of Roto-Rooter Management Company and
Roto-Rooter Services Company and its subsidiaries are eligible to participate in
the Retirement and Savings Plan. Under the Retirement and Savings Plan, the
Shares held by the Plan Trustee are allocated to each participant's account
based upon the dollar amounts held in such participant's account. Each
Participant has the right under the Retirement and Savings Plan to direct the
Plan Trustee whether or not to tender pursuant to the Offer the Shares allocated
to his or her account.
 
     As of the date hereof, no executive officer or director of the Purchaser,
or to the knowledge of Purchaser, any of their associates, beneficially owns, or
has the right to acquire, directly or indirectly, any Shares, except as set
forth in Schedule I to this Offer to Purchase. Each of the executive officers
and directors of the Purchaser listed in Schedule I to this Offer to Purchase
who beneficially owns, or has a right to acquire, directly or indirectly, any
Shares, has indicated to the Purchaser that he or she presently intends to
tender his or her Shares pursuant to the Offer, subject to the requirements of
Section 16(b) of the Exchange Act and, in the cases of Messrs. E. L. Hutton and
Griffin, to the contractual restrictions applicable to restricted stock.
 
                                       10
<PAGE>   13
 
     Neither the Purchaser, nor, to the knowledge of the Purchaser, any of the
executive officers and directors of the Purchaser, has engaged in any
transaction in the Shares in the past 60 days, except that in May 1996: (i)
Edward L. Hutton, Kevin J. McNamara, William R. Griffin, Thomas C. Hutton,
Sandra E. Laney, John M. Mount, Timothy S. O'Toole, Donald E. Saunders and
George J. Walsh III each received unrestricted stock awards covering 75 Shares
at $33.50 per Share under a Company stock incentive plan; (ii) Edward L. Hutton
exercised options for 10,000 Shares at $23.88 per Share and disposed of 7,243
Shares to offset taxes and the purchase price for exercising such options; (iii)
Kevin J. McNamara (a) exercised options for 500 Shares at $25.25 per Share and
disposed of 385 Shares to offset taxes and the purchase price for exercising
such options, (b) exercised options for 250 Shares at $23.88 per Share and
disposed of 187 Shares to offset taxes and the purchase price for exercising
such options and (c) exercised options for 500 Shares at $27.00 per Share and
disposed of 398 Shares to offset taxes and the purchase price for exercising
such options; (iv) William R. Griffin exercised options for 5,000 Shares at
$23.88 per Share and disposed of 3,596 Shares to offset taxes and the purchase
price for exercising such options; and (v) Sandra E. Laney exercised options for
250 Shares at 23.88 and exercised options for 500 Shares at $25.25 per Share and
disposed of 572 Shares to offset taxes and the purchase price for exercising all
such options.
 
     Related Transactions.  The Company and the Purchaser are involved in the
following related transactions:
 
     The Company regularly deposits funds in excess of its working capital
requirements with the Purchaser for short-term investment and the Purchaser, on
occasion, may make short-term loans to the Company for working capital needs.
These unsecured deposits and loans bear interest at the rate equal to fifty
basis points above 2-year United States Treasury Notes for balances up to $5
million and fifty basis points above three year United States Treasury Notes for
balances above $5 million. At January 31, 1996, the Company had $16,392,000 on
deposit with the Purchaser. During the period January 1, 1995 through January
31, 1996, the largest amount on deposit with the Purchaser was $26,266,000. The
Purchaser paid the Company $540,000, $618,000 and $1,424,000, respectively,
during 1993, 1994 and 1995 as interest on amounts deposited by the Company with
the Purchaser.
 
     During 1991, the Purchaser loaned to the Company $4,200,000 to partially
finance the acquisition of Convenient Home Services, Inc. which changed its name
to Service America Systems, Inc. in July 1994 ("Service America"). This loan
bears interest at the rate determined on the basis of United States Treasury
Notes. In addition, during 1993, the Purchaser loaned to the Company $4,224,000
to partially finance the acquisition of Encore Services Systems, Inc., a
subsidiary of Service America. This loan bears interest at the fixed rate of
8.15%. At January 31, 1996, the Company had $8,424,000 on loan from the
Purchaser, which was the largest amount on loan from the Purchaser at any time
during the period January 1, 1993 through January 31, 1996. The Company paid the
Purchaser $351,000, $603,000 and $631,000, respectively, during 1993, 1994 and
1995 as interest on amounts loaned to the Company from the Purchaser.
 
     As a subsidiary of the Purchaser and pursuant to an agreement with the
Purchaser, the Company has used various financial, insurance, tax, audit, legal
and other services provided by the Purchaser. The Company pays fees for these
services based on the Purchaser's costs. The Company paid the Purchaser $305,000
for such services in 1995; $227,686 for such services in 1994; and $213,129 for
such services in 1993. In addition, the Company has entered into a sublease
agreement with the Purchaser pursuant to which the Company leases approximately
23,500 square feet of office space from the Purchaser on the 25th and 30th
floors of Chemed Center, 2255 East Fifth Street, Cincinnati, Ohio, at a rental
equal to that paid by the Purchaser under its lease and for a term coterminous
with the Purchaser's lease term which expires in 2006. For 1993, 1994 and 1995,
the Company paid the Purchaser lease payments under the sublease aggregating
$359,000, $413,000 and $491,000, respectively.
 
     The Company owns 70% of the outstanding capital stock of Service America
and the Purchaser owns the remaining outstanding 30%. As mentioned above, the
Purchaser also loaned the Company $4,200,000 to partially fund the Company's
acquisition of its 70% interest. None of the executive officers or directors of
the Purchaser are officers or directors of Service America; however, the
Purchaser, indirectly through its representation on the Company Board, could
exercise control over Service America. See "-- Background to
 
                                       11
<PAGE>   14
 
the Offer" above. Service America is engaged primarily in the air conditioning
and appliance maintenance and repair business in Florida primarily through the
sale of service contracts which generally cover a one-year period. In July 1993,
Service America completed the acquisition of all the outstanding shares of
Common Stock of Encore Services, Inc. ("Encore"), which is also primarily
engaged in the air conditioning and appliance maintenance and repair business
through service contracts in Florida and Arizona. Service America had net income
of $1,380,000, $812,000 and $1,253,000 in fiscal years 1993, 1994 and 1995,
respectively.
 
     Should any state or locality impose, or should the Purchaser and the
Company elect to pay, an income or franchise tax by combining or consolidating
all or part of the income, losses, properties, payrolls, sales or other
attributes of the Purchaser and the Company or one or more of their respective
subsidiaries, the Company has agreed to reimburse the Purchaser for the
Company's and its subsidiaries' share of such franchise or income tax. The
amount to be reimbursed is equal to the tax that would have been required to be
paid had the Company or any of its subsidiaries included in such combined or
consolidated return filed a separate return without the inclusion of any income,
losses, properties, payrolls, sales or other attributes of any related parent or
subsidiary corporation.
 
     The Company has a program under which three nominations for membership on
the Company Board are made each year from a rotating group of senior officers of
the Company, senior executives of its operating divisions and subsidiaries and
senior executives of the Purchaser. The persons currently considered to be in
the rotating group are Ms. Naomi C. Dallob and Messrs. Richard L. Arquilla,
Brian A. Brumm, Gary C. Burger, Spencer S. Lee, and Timothy S. O'Toole. Ms.
Dallob and Messrs. Brumm and O'Toole were nominated in 1996.
 
     The Company has entered into an employment agreement with Mr. William R.
Griffin, who is the President and Chief Executive Officer of the Company and an
Executive Vice President of the Purchaser. The employment agreement provides for
Mr. Griffin's continued employment as an executive employee of the Company
through October 31, 2000, subject to earlier termination under certain
circumstances, at a base salary of $310,000 per annum or such higher amounts as
the Roto-Rooter Board may determine, as well as participation in incentive
compensation plans, stock incentive plans and other employee benefit plans. In
the event of termination without cause or a material reduction in authority or
responsibility, the agreement provides that Mr. Griffin will receive severance
payments equal to 150 percent of his then current base salary plus the amount of
incentive compensation most recently paid or approved in respect of the previous
year, and the fair market value of all stock awards which have vested during the
twelve months prior to termination, for the balance of the term of the
agreement.
 
FAIRNESS OF THE OFFER
 
     At its meeting on August 7, 1996, the Chemed Board (with Mr. Griffin
abstaining) resolved that the Offer is fair to the holders of Shares other than
the Purchaser. In forming such belief, the Chemed Board considered the following
factors, which are listed in their relative order of importance to the Chemed
Board's decision:
 
     Opinion of CS First Boston.  The Chemed Board gave significant weight to
the presentation made by CS First Boston to the Chemed Board at its meeting on
August 7, 1996, and the oral opinion delivered by CS First Boston to the Chemed
Board at that meeting (and subsequently confirmed in writing on August 8, 1996),
that, as of the date of such opinion and based upon and subject to the factors
and assumptions reviewed with the Chemed Board, the cash consideration to be
received by the stockholders of the Company pursuant to the Offer was fair to
such stockholders other than the Purchaser from a financial point of view. See
"-- Opinion of Financial Advisor" below.
 
     Prior Discussions.  The Chemed Board considered the discussions in July
1995 relating to the then proposed transaction between the Purchaser and the
Company. The Chemed Board noted that the Offer was at a higher price than the
Second Counter-Proposal. See "-- Background to the Offer" above. The Chemed
Board also noted that, unlike the stock-for-stock proposed transaction in 1995,
the Offer was for cash, which the Chemed Board believed was a more attractive
form of consideration.
 
                                       12
<PAGE>   15
 
     Company Financial Performance.  Because the Company represents a
significant investment for Chemed, all the members of the Chemed Board are
familiar with the Company's financial information and historical performance and
are able to make informed judgments regarding the positive and negative aspects
of the Company in assessing whether or not the Offer was fair to the Company's
stockholders other than the Purchaser. In particular, Chemed Board considered
the fact that the Offer Price of $41.00 represented a multiple of 17.8 times
Roto-Rooter's estimated 1996 earnings.
 
     Historic Illiquidity of the Shares.  The Chemed Board considered the fact
that historically, the Shares have traded thinly. The Chemed Board reviewed
statistics showing that the median daily trading volume for the Shares during
the period since January 1994 ranged from 200 to 900 Shares per day and that the
median bid/ask spread on the Shares during such period ranged from $2.00 to
$2.50. The Chemed Board viewed the Offer as giving stockholders, particularly
those holding a large number of Shares, an opportunity to immediately realize
value for their Shares at a fixed price.
 
     Historical Trading Prices.  The Chemed Board considered the fact that the
Offer price of $41.00 represented a premium of approximately 20% over the
closing bid price of $34.00 per Share on August 7, 1996. The Chemed Board
reviewed trading information relating to the Shares since January 1995, which
showed that the trading prices for the Shares since that time had generally been
at a significant discount to the Offer price. The Chemed Board did not attach
significant weight to this factor, as the historical illiquidity of the Shares
(as described above) reduces the usefulness of historic trading prices for the
Shares as an indicator of the value of the Company at any moment in time.
 
OPINION OF FINANCIAL ADVISOR
 
     Chemed retained CS First Boston to act as its exclusive financial advisor
and as Dealer Manager in connection with the Offer. On August 7, 1996, CS First
Boston rendered to the Chemed Board its oral opinion, subsequently confirmed on
August 8, 1996 by delivery of a written opinion (the "CS First Boston Opinion"),
that, as of such date and based upon and subject to the factors and assumptions
set forth in such written opinion, the cash consideration to be received by the
stockholders of Roto-Rooter pursuant to the Offer was fair to such stockholders
other than Chemed from a financial point of view. No limitations were imposed by
the Chemed Board upon CS First Boston with respect to investigations made or
procedures followed by CS First Boston in rendering the CS First Boston Opinion.
CS First Boston was not requested to opine as to the fairness of the Offer to
Chemed.
 
     The full text of the CS First Boston Opinion, which sets forth the
assumptions made, matters considered, qualifications and limitations on the
review undertaken by CS First Boston, is attached as Appendix A to this Offer to
Purchase and is incorporated herein by reference. The CS First Boston Opinion
was requested by the Chemed Board for its information and is directed only to
the fairness from a financial point of view of the cash consideration to be
received by the stockholders of Roto-Rooter other than Chemed pursuant to the
Offer. The CS First Boston Opinion does not constitute a recommendation to any
stockholder as to whether such stockholder should tender Shares pursuant to the
Offer. The CS First Boston Opinion is based upon financial, economic, market,
and other conditions as they existed and could be evaluated as of the date of
the CS First Boston Opinion. The summary of the CS First Boston Opinion set
forth in this Offer to Purchase is qualified in its entirety by reference to the
full text of the opinion set forth in Appendix A and incorporated herein by
reference.
 
     The summary set forth below does not purport to be a complete description
of the analyses underlying the CS First Boston Opinion or the presentation made
by CS First Boston to the Chemed Board. The preparation of a fairness opinion is
a complex analytic process involving various determinations as to the most
appropriate and relevant methods of financial analyses and the application of
those methods to the particular circumstances and, therefore, such an opinion is
not readily susceptible to partial analysis or summary description. In arriving
at its opinion, CS First Boston did not attribute any particular weight to any
analysis or factor considered by it, but rather made qualitative judgments as to
the significance and relevance of each analysis and factor. Accordingly, CS
First Boston believes that its analyses must be considered as a whole and
 
                                       13
<PAGE>   16
 
that selecting portions of its analyses, without considering all analyses, would
create an incomplete view of the process underlying its opinion.
 
     In performing its analyses, CS First Boston made numerous assumptions with
respect to industry performance, general business, economic, market and
financial conditions and other matters, many of which are beyond the control of
Chemed or Roto-Rooter. Any estimates contained in the analyses performed by CS
First Boston are not necessarily indicative of actual values or future results,
which may be significantly more or less favorable than suggested by such
analyses. Additionally, estimates of the value of businesses or securities do
not purport to be appraisals or to reflect the prices at which such businesses
or securities might actually be sold. Accordingly, such analyses and estimates
are inherently subject to substantial uncertainty. In addition, as described
above, CS First Boston's opinion of August 7, 1996 and its presentation to the
Chemed Board were among several factors taken into consideration by the Chemed
Board in making its determination to commence the Offer. Consequently, the CS
First Boston analyses described below should not be viewed as, and was not,
determinative of the decision of the Chemed Board with respect to the cash
consideration to be received by the stockholders of Roto-Rooter other than
Chemed pursuant to the Offer.
 
     In arriving at its opinion, CS First Boston reviewed certain publicly
available business and financial information relating to Roto-Rooter, as well as
a draft dated August 6, 1996 of this Offer to Purchase. CS First Boston also
reviewed certain other information, including financial forecasts, provided to
it by Roto-Rooter and Chemed, and met with the management of Chemed to discuss
the business and prospects of Roto-Rooter. The material aspects of the financial
forecasts reviewed by CS First Boston are summarized below. SEE "THE TENDER
OFFER -- CERTAIN INFORMATION CONCERNING THE COMPANY" FOR A DISCUSSION OF CERTAIN
IMPORTANT FACTORS THAT MAY RESULT IN THE COMPANY'S ACTUAL FINANCIAL PERFORMANCE
DIFFERING FROM THESE FORECASTS.
 
     CS First Boston also considered certain financial and stock market data of
Roto-Rooter, and compared that data with similar data for other publicly held
companies in businesses similar to that of Roto-Rooter. In addition, CS First
Boston considered the financial terms of certain other acquisitions and business
combinations that have recently been effected. CS First Boston also considered
such other information, financial studies, analyses and investigations and
financial, economic and market criteria that it deemed relevant.
 
     In connection with its review, CS First Boston did not assume any
responsibility for independent verification of any of the foregoing information
and relied on such information being complete and accurate in all material
respects. With respect to the financial forecasts, CS First Boston assumed that,
at the time they were prepared, they were reasonably prepared on bases
reflecting the best available estimates and judgments at the time of
Roto-Rooter's management as to the future financial performance of Roto-Rooter,
and, as currently updated and adjusted, reflect the best currently available
estimates and judgments of Chemed's management as to the future financial
performance of Roto-Rooter. In addition, CS First Boston did not make an
independent evaluation or appraisal of the assets or liabilities (contingent or
otherwise) of Roto-Rooter, nor was it furnished with any such evaluations or
appraisals. The CS First Boston Opinion is necessarily based upon financial,
economic, market and other conditions as they existed and could be evaluated as
of the date of the CS First Boston Opinion. CS First Boston was not requested
to, and did not, solicit third party indications of interest in acquiring all or
any part of Roto-Rooter.
 
     The following is a summary of the analyses performed by CS First Boston and
presented to the Chemed Board in connection with the preparation of the CS First
Boston Opinion.
 
     Trading History.
 
     CS First Boston reviewed the daily recorded last trading, bid and ask
prices, as well as daily trading volume for the Shares for the period from
January 1, 1994 through August 2, 1996 and calculated certain median statistics,
based on such daily trading information, for each of the periods beginning on
January 1, 1994, January 1, 1995, July 1, 1995, January 1, 1996 and July 1, 1996
and ending, in each case, on August 2, 1996. CS First Boston noted that the low
median daily trading volume of 200 to 900 Shares per day and the wide median
bid/ask spread of $2.00 to $2.50 reflected in such trading information
demonstrated the illiquidity of the Shares.
 
                                       14
<PAGE>   17
 
     Comparable Companies Analysis.
 
     CS First Boston performed a comparable companies analysis in which it
compared certain publicly available historical financial and operating data,
projections of future financial performance (reflecting equity research
analysts' estimates) and market statistics (calculated based upon closing stock
prices on August 2, 1996) of selected publicly traded companies considered by CS
First Boston to be reasonably comparable to Roto-Rooter with similar historical
financial and operating data, projections of future financial performance
(reflecting the Roto-Rooter Projections (as defined below)) and market
statistics (also calculated based upon closing stock prices on August 2, 1996)
of Roto-Rooter. The comparable companies were ABM Industries Incorporated,
Barefoot, Inc., The Dwyer Group, Inc., Rollins, Inc., ServiceMaster LP and York
International Corporation (collectively, the "Comparable Companies"). CS First
Boston compared the Market Value and the Adjusted Market Value (both as defined
below) as a multiple of operating results for each of the Comparable Companies
with those of Roto-Rooter. For purposes of this analysis, CS First Boston
defined Market Value as a company's share price multiplied by fully diluted
shares outstanding less exercisable stock option proceeds and defined Adjusted
Market Value as the Market Value plus net debt. CS First Boston also calculated,
for Roto-Rooter and each of the Comparable Companies, the current market price
per share as a multiple (the "P/E Ratio") of 1996 estimated earnings per share
("EPS"), reflecting a composite of equity research analysts' estimates. The P/E
Ratio calculated by CS First Boston for Roto-Rooter was 16.0x, as compared with
a range of 11.3x to 16.7x for the Comparable Companies.
 
     Based on its comparable companies analysis, CS First Boston derived an
equity value reference range for Roto-Rooter of $134.0 to $198.1 million, or
$26.01 to $38.44 per Share. CS First Boston also used this analysis, among other
things, to derive the terminal value multiples utilized in its discounted cash
flow analysis described below.
 
     Comparable Acquisitions Analysis.
 
     CS First Boston's comparable acquisitions analysis consisted of a minority
buy-out analysis and an industry comparables analysis.
 
     Minority Buy-Out Analysis.  CS First Boston reviewed publicly available
information regarding 39 cash minority buy-outs completed over the period from
January 1990 to July 1996 (the "Minority Buy-Out Comparables") and calculated
the high, low, mean and median percentage premiums of the cash consideration
paid over the stock price of each of the targets one day, one week and one month
prior to the announcement of such buy-outs. CS First Boston calculated median
and mean premiums of (i) 19.4% and 23.2%, respectively, over the target's stock
price one day prior to announcement; (ii) 20.7% and 25.7%, respectively, over
the target's stock price one week prior to announcement; and (iii) 23.9% and
27.6%, respectively, over the target's stock price one month prior to
announcement.
 
     CS First Boston then calculated implied values for the Shares by
application of the median and mean percentage premiums offered to the target
stockholders in the Minority Buy-Out Comparables to the closing bid price of the
Shares one day, one week and one month prior to August 2, 1996. Based on the
median premiums, the analysis yielded: (i) implied values for the Shares one
day, one week and one month prior to announcement of $40.60, $40.43 and $42.75,
respectively; (ii) a one week mean of $40.79; and (iii) a one month mean of
$42.11. Based on the mean premiums, the analysis yielded (i) implied values for
the Shares one day, one week and one month prior to announcement of $41.89,
$42.11 and $44.02, respectively; (ii) a one week mean of $42.48; and (iii) a one
month mean of $43.36. Based on its minority buy-out analysis, CS First Boston
derived an implied equity value reference range for Roto-Rooter of $208.3 to
$226.8 million, or $40.43 to $44.02 per Share.
 
     Industry Comparables Analysis.  CS First Boston reviewed certain publicly
available information regarding 11 business combinations involving companies in
the service industry consummated since June 1988 (the "Acquisition
Comparables"). The Acquisition Comparables were: (i) American Eco Corporation's
acquisition of EIF Holdings, Inc., (ii) Hudson Technologies, Inc.'s acquisition
of Refrigerant Reclaimation Industries Inc., (iii) Wall Street Financial
Corporation's acquisition of Honolulu Roofing Co. Ltd., (iv) Air-Cure
Environmental, Inc.'s acquisition of Amerex USA, (v) ABM Industries
Incorporated's acquisition of
 
                                       15
<PAGE>   18
 
General Maintenance Service Co., (vi) Rust International Inc.'s acquisition of
EnClean, Inc., (vii) ISS-International Service Systems A/S' acquisition of
Commercial Services Division (Electrolux AB), (viii) Lyonaise des Eaux's
acquisition of Dumez S.A., (ix) American International Group Inc.'s acquisition
of Fischbach Corporation, (x) York International Corporation's acquisition of
RECO International and (xi) Citicorp Capital Investors Ltd.'s acquisition of
York International Corporation.
 
     CS First Boston compared the Adjusted Market Value of each Acquisition
Comparable as a multiple of the publicly available latest twelve months' ("LTM")
sales of the acquired companies. The multiples derived using this analysis
ranged from 0.9x to 1.0x. Based on its industry comparables analysis, CS First
Boston derived an equity value reference range for Roto-Rooter of $177.3 to
$195.8 million, or $34.40 to $38.00 per Share.
 
     CS First Boston also considered the fact that in 1995 the Special Committee
had indicated that it would approve an exchange of one Chemed Share and $4.00 in
cash for each Share (implying a value of $37.75 per Share based on the
then-current Chemed market value). Using that implied value, CS First Boston
calculated implied multiples for sales; earnings before interest, taxes,
depreciation and amortization ("EBITDA"); earnings before interest and taxes
("EBIT"); net income; and book value of Roto-Rooter based on Roto-Rooter
operating results available at the time the Second Counter-Proposal was made.
Based on such analysis, CS First Boston calculated an equity value reference
range for Roto-Rooter, based on current operating results, of $205.0 to $221.3
million, or $39.78 to $42.94 per Share.
 
     Based on the two components of its comparable acquisitions analysis, CS
First Boston derived an equity value reference range for Roto-Rooter of $177.3
to $221.3 million, or $34.40 to $42.94 per Share.
 
  Discounted Cash Flow Analysis.
 
     CS First Boston performed a discounted cash flow analysis of the projected
cash flows of Roto-Rooter for the fiscal years 1996 through 2000, based upon
projections for Roto-Rooter Corp. (the "Franchise Company"), Roto-Rooter Service
Company (the "Service Company") and Service America, developed by Roto-Rooter's
management for 1996 and 1997 in connection with its business planning in late
1995. The 1996 projections were updated by Roto-Rooter management in mid-1996 to
reflect recent operating results and were provided to CS First Boston by the
management of Chemed. Based on conversations with Chemed management, the
Roto-Rooter Projections were further updated and adjusted for the period from
1996 through 2000 (the "Roto-Rooter Projections").
 
     In performing its discounted cash flow analysis, CS First Boston valued the
Franchise Company and the Service Company separately from the 70%-owned Service
America.
 
     For the Franchise Company, the Roto-Rooter Projections assumed (i) sales
growth of 5.2% for each of the years 1996 through 2000 and (ii) EBIT Margin
(defined for purposes of this analysis as EBIT before intangible amortization)
of 35.9% in 1996, with an increase of 1% per year for each year thereafter
through 2000. For the Service Company, the Roto-Rooter Projections assumed (i)
sales growth of 17% in 1996 and 12% for each year thereafter through 2000 and
(ii) EBIT Margin of 12.1% in 1996 and for each year thereafter through 2000. For
Service America, the Roto-Rooter Projections assumed (i) sales growth of 7.1% in
1996 and 10.5% for each year thereafter through 2000 and (ii) EBIT Margin of
6.6% in 1996 and 7.5% for each year thereafter through 2000.
 
     On an adjusted consolidated basis, the Roto-Rooter Projections indicated
(i) revenue growth of 13.3% in 1996 and 11.2% for each year thereafter through
2000; (ii) EBIT Margin of 10.8% in 1996 and 11.0% thereafter through 2000 and
(iii) EBITDA Margin (defined for purposes of this analysis as EBITDA after
intangible amortization) of 13.5% in 1996 and 13.7% in each year thereafter
through 2000.
 
     Based on the Roto-Rooter Projections, CS First Boston derived equity value
reference ranges for (i) the Franchise Company and the Service Company and (ii)
70% of Service America and added them to determine an equity value reference
range for Roto-Rooter on a consolidated basis. For purposes of this analysis, CS
First Boston utilized discount rates reflecting a weighted average cost of
capital of 11.5% and 12.5% and terminal value multiples of 2000 EBITDA (derived
from the comparable companies analysis) of 6.0x and 7.0x. Based
 
                                       16
<PAGE>   19
 
on this analysis, CS First Boston calculated the following equity value
reference ranges: (i) $179.2 to $204.7 million for the Franchise Company and the
Service Company, (ii) $11.9 to $17.4 million for Roto-Rooter's 70% interest in
Service America and (iii) $191.1 to $222.0 million, or $37.09 to $43.09 per
Share, for Roto-Rooter.
 
  Summary Valuation.
 
     Based upon the above valuation analyses, CS First Boston derived an equity
value reference range for Roto-Rooter of $180.0 to $220.0 million, or $34.93 to
$42.70 per Share.
 
     Pursuant to a letter agreement dated as of August 6, 1996 between Chemed
and CS First Boston, Chemed agreed to pay CS First Boston an aggregate fee of
$900,000 for services thereunder, of which $50,000 became payable upon CS First
Boston's engagement and the balance became payable upon approval by the Chemed
Board of the commencement of the Offer. None of CS First Boston's fees are
contingent upon the acquisition of any Shares pursuant to the Offer. Chemed also
has agreed to reimburse CS First Boston for all out-of-pocket expenses,
including the fees and expenses of its legal counsel and other advisors. Chemed
has further agreed to indemnify CS First Boston and certain related persons and
entities for certain losses, claims, damages or liabilities (including action or
proceedings in respect thereof) related to or arising out of, among other
things, its engagement as financial advisor.
 
     Chemed retained CS First Boston based upon CS First Boston's experience and
expertise. Since 1986, CS First Boston has provided financial advisory and
investment banking services to Chemed, and acted as Chemed's exclusive financial
advisor in connection with its proposed stock-for-stock merger with Roto-Rooter
in 1995. See "--Background to the Offer" above. CS First Boston is an
internationally recognized investment banking and advisory firm. CS First
Boston, as part of its investment banking business, is continuously engaged in
the valuation of businesses and securities in connection with mergers and
acquisitions, negotiated underwritings, competitive biddings, secondary
distributions of listed and unlisted securities, private placements, and
valuations for corporate and other purposes. In the ordinary course of its
business, CS First Boston and its affiliates may actively trade the debt and
equity securities of Chemed and the equity securities of Roto-Rooter for their
own account and for the accounts of customers and, accordingly, may at any time
hold a long or short position in such securities.
 
CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
     The receipt of cash for Shares pursuant to the Offer (or pursuant to the
Second Step Merger, if consummated) will be taxable for Federal income tax
purposes under the Code, and also may be taxable under applicable state, local,
foreign and other tax laws. In general, for Federal income tax purposes, a
stockholder will receive gain or loss equal to the difference between the amount
of cash received and such holder's tax basis for the Shares sold. Such gain or
loss will be a capital gain or loss provided the Shares are a capital asset in
the hands of the stockholders and will be a long-term capital gain or loss if
the Shares have been held for more than 12 months.
 
     The foregoing discussion may not be applicable to stockholders who acquired
their Shares pursuant to the exercise of employee stock options or otherwise as
compensation, who are not citizens or residents of the United States or who are
otherwise subject to special tax treatment under the Code.
 
     THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY. EACH STOCKHOLDER IS URGED TO CONSULT HIS OR HER OWN TAX
ADVISOR TO DETERMINE THE PARTICULAR TAX CONSEQUENCES OF THE OFFER (AND THE
SECOND STEP MERGER, IF CONSUMMATED), INCLUDING THE APPLICABILITY AND EFFECT OF
STATE, LOCAL, FOREIGN AND OTHER TAX LAWS.
 
APPRAISAL RIGHTS
 
     UNDER THE DGCL, HOLDERS OF SHARES NOT PURCHASED BY THE PURCHASER ARE NOT
ENTITLED TO APPRAISAL RIGHTS IN CONNECTION WITH THE OFFER. However, if following
consummation of the Offer, the Purchaser owns 90% or
 
                                       17
<PAGE>   20
 
more of the outstanding Shares and the Purchaser consummates the Second Step
Merger, holders of Shares not purchased by the Purchaser will be entitled to
appraisal rights under the DGCL as follows.
 
     The following discussion is not a complete statement of the law pertaining
to appraisal rights under the DGCL and is qualified in its entirety by the full
text of Section 262 of the DGCL ("Section 262"). All references in Section 262
and in this summary to a "stockholder" or "holders" are to the record holder of
the Shares as to which appraisal rights are asserted.
 
     Under the DGCL, holders of Shares ("Appraisal Shares") who follow the
procedures set forth in Section 262 will be entitled to have their Appraisal
Shares appraised by the Delaware Chancery Court and to receive payment in cash
of the "fair value" of such Appraisal Shares, exclusive of any element of value
arising from the accomplishment or expectation of the Second Step Merger,
together with a fair rate of interest, if any, as determined by such court.
 
     Under Section 262, the Purchaser, either before the effective date of the
Second Step Merger or within ten days thereafter, must notify each of its
stockholders entitled to appraisal rights of the effective date of the Second
Step Merger and that appraisal rights are available, and must include in such
notice a copy of Section 262.
 
     A holder of Appraisal Shares wishing to exercise such holder's appraisal
rights must deliver to the Purchaser within 20 days after the date of mailing of
the notice described in the preceding paragraph a written demand for appraisal
of such holder's Appraisal Shares. A holder of Appraisal Shares wishing to
exercise such holder's appraisal rights must be the record holder of such
Appraisal Shares on the date the written demand for appraisal (as described
below) is made and must continue to hold such Appraisal Shares of record through
the effective date of the Second Step Merger. Accordingly, a holder of Appraisal
Shares who is the record holder of Appraisal Shares on the date the written
demand for appraisal is made (if such demand is made prior to the effectiveness
of the Second Step Merger), but who thereafter transfers such Appraisal Shares
prior to the consummation of the Second Step Merger, will lose any right to
appraisal in respect of such Appraisal Shares.
 
     Within 120 days after the effective date of the Second Step Merger, but not
thereafter, the Purchaser or any stockholder who has complied with the statutory
requirements summarized above and who is otherwise entitled to appraisal rights
may file a petition in the Delaware Chancery Court demanding a determination of
the fair value of the Appraisal Shares. The Purchaser is under no obligation to
file a petition with respect to the appraisal of the fair value of the Appraisal
Shares and does not intend to do so. Accordingly, it is the obligation of the
stockholders seeking appraisal rights to initiate all necessary action to
perfect their appraisal rights within the time prescribed in Section 262.
 
     Within 120 days after the effective date of the Second Step Merger, any
stockholder who has complied with the statutory requirements summarized above
will be entitled, upon written request, to receive from the Purchaser a
statement setting forth the aggregate number of Appraisal Shares with respect to
which demands for appraisal have been received and the aggregate number of
holders of such Appraisal Shares. Such statements must be mailed within ten days
after a written request therefor has been received by the Purchaser or within
ten days after expiration of the period for delivery of demands for appraisal,
whichever is later.
 
     If a petition for an appraisal is timely filed, after a hearing on such
petition, the Delaware Chancery Court will determine the stockholders entitled
to appraisal rights and will appraise the "fair value" of their Appraisal
Shares, exclusive of any element of value arising from the accomplishment or
expectation of the Second Step Merger, together with a fair rate of interest, if
any, to be paid upon the amount determined to be the fair value.
 
     The costs of the proceeding may be determined by the Delaware Chancery
Court and taxed upon the parties as the Delaware Chancery Court deems equitable
in the circumstances. Upon application of a stockholder, the Delaware Chancery
Court may also order all or a portion of the expenses incurred by any
stockholder in connection with the appraisal proceeding, including, without
limitation, reasonable attorneys' fees and the fees and expenses of experts, to
be charged pro rata against the value of all of the Appraisal Shares entitled to
appraisal.
 
                                       18
<PAGE>   21
 
     Any holder of Appraisal Shares who has duly demanded an appraisal in
compliance with Section 262 will not, from and after the effective date of the
Second Step Merger, be entitled to vote the Appraisal Shares subject to such
demand for any purpose or to receive payment of dividends or other distributions
on those Appraisal Shares (except dividends or other distributions payable to
stockholders of record at a date which is prior to the effective date of the
Second Step Merger).
 
     If any stockholder who properly demands appraisal of his Appraisal Shares
under Section 262 fails to perfect, or effectively withdraws or loses, his right
to appraisal, as provided in the DGCL, the Appraisal Shares of such stockholder
will be converted into the right to receive the consideration receivable with
respect to such Appraisal Shares pursuant to the Second Step Merger. A
stockholder will fail to perfect, or effectively lose or withdraw, his right to
appraisal if, among other things, no petition for appraisal is filed within 120
days after the consummation of the Second Step Merger, or if the stockholder
delivers to the Purchaser a written withdrawal of his demand for appraisal. Any
such attempt to withdraw an appraisal demand more than 60 days after the
consummation of the Second Step Merger will require the written approval of the
Purchaser.
 
                                THE TENDER OFFER
 
TERMS OF THE OFFER
 
     Upon the terms and subject to the conditions of the Offer, the Purchaser
will accept for payment and pay for any and all Shares validly tendered prior to
the Expiration Date and not theretofore withdrawn in accordance with the
provisions set forth under "-- Withdrawal Rights" below. The term "Expiration
Date" means 12:00 Midnight, New York City time, on Wednesday, September 11,
1996, unless and until the Purchaser shall have extended the period of time
during which the Offer is open, in which event the term "Expiration Date" shall
mean the latest time and date at which the Offer, as so extended by the
Purchaser, shall expire.
 
     Subject to the applicable rules and regulations of the Commission, the
Purchaser expressly reserves the right, in its sole discretion, at any time and
from time to time, and regardless of whether or not any of the events set forth
in "-- Certain Conditions of the Offer" below shall have occurred or shall have
been determined by the Purchaser to have occurred, to (a) extend the period of
time during which the Offer is open, and thereby delay acceptance for payment
of, and payment for, any Shares, by giving oral or written notice of such
extension to the Depositary and (b) amend the Offer in any other respect by
giving oral or written notice of such amendment to the Depositary. UNDER NO
CIRCUMSTANCES WILL ANY INTEREST BE PAID ON THE OFFER PRICE FOR TENDERED SHARES,
REGARDLESS OF ANY EXTENSION OF THE OFFER OR ANY DELAY IN MAKING SUCH PAYMENT.
 
     If by 12:00 Midnight, New York City time, on Wednesday, September 11, 1996
(or at any date or time then set as the Expiration Date), any or all conditions
to the Offer have not been satisfied or waived, the Purchaser reserves the right
(but shall not be obligated), subject to the applicable rules and regulations of
the Commission, to (a) terminate the Offer and not accept for payment any Shares
and return all tendered Shares to tendering stockholders, (b) waive all the
unsatisfied conditions and, subject to complying with the applicable rules and
regulations of the Commission, accept for payment and pay for all Shares validly
tendered prior to the Expiration Date and not theretofore withdrawn, (c) extend
the Offer and, subject to the right of stockholders to withdraw Shares until the
Expiration Date, retain the Shares that have been tendered during the period or
periods for which the Offer is extended or (d) amend the Offer. The rights
reserved by the Purchaser in this paragraph are in addition to the Purchaser's
right to terminate the Offer set forth under "-- Certain Conditions of the
Offer" below.
 
     There can be no assurance that the Purchaser will exercise its right to
extend the Offer. Any extension, waiver, amendment or termination will be
followed as promptly as practicable by public announcement. In the case of an
extension, Rule 14e-1(d) under the Exchange Act requires that the announcement
be issued no later than 9:00 a.m., New York City time, on the next business day
after the previously scheduled Expiration Date in accordance with the public
announcement requirements of Rule 14d-4(c) under the Exchange Act. Subject to
applicable law (including Rules 14d-4(c) and 14d-6(d) under the Exchange Act,
which require
 
                                       19
<PAGE>   22
 
that any material change in the information published, sent or given to
stockholders in connection with the Offer be promptly disseminated to
stockholders in a manner reasonably designed to inform stockholders of such
change), and without limiting the manner in which the Purchaser may choose to
make any public announcement, the Purchaser will not have any obligation to
publish, advertise or otherwise communicate any such public announcement other
than by making a release to the Dow Jones News Service.
 
     If the Purchaser extends the Offer or if the Purchaser is delayed in its
acceptance for payment of or payment for Shares (whether before or after its
acceptance for payment of Shares) or it is unable to pay for Shares pursuant to
the Offer for any reason, then, without prejudice to the Purchaser's rights
under the Offer, the Depositary may retain tendered Shares on behalf of the
Purchaser, and such Shares may not be withdrawn except to the extent tendering
stockholders are entitled to withdrawal rights as described under "-- Withdrawal
Rights" below. However, the ability of the Purchaser to delay the payment for
Shares that the Purchaser has accepted for payment is limited by Rule 14e-1(c)
under the Exchange Act, which requires that a bidder pay the consideration
offered or return the securities deposited by or on behalf of holders of
securities promptly after the termination or withdrawal of such bidder's offer.
 
     If the Purchaser makes a material change in the terms of the Offer or the
information concerning the Offer or waives a material condition of the Offer,
the Purchaser will disseminate additional tender offer materials and extend the
Offer to the extent required by Rules 14d-4(c), 14d-6(d) and 14e-1 under the
Exchange Act. The minimum period during which the Offer must remain open
following material changes in the terms of the Offer or information concerning
the Offer, other than a change in price or a change in the percentage of
securities sought, will depend upon the facts and circumstances then existing,
including the relative materiality of the changed terms or information. With
respect to a change in price or a change in the percentage of securities sought,
a minimum period of 10 business days is generally required to allow for adequate
dissemination to stockholders.
 
     This Offer to Purchase and related Letter of Transmittal and other relevant
materials are being mailed by Purchaser to record holders of Shares, and will be
furnished to brokers, dealers, banks, trust companies and similar persons whose
names, or the names of whose nominees, appear on the stockholder lists, or, if
applicable, who are listed as participants in a clearing agency's security
position listing, for subsequent transmittal to beneficial owners of Shares.
 
PROCEDURE FOR TENDERING SHARES
 
     Valid Tender.  For a stockholder validly to tender Shares pursuant to the
Offer, either (a) a properly completed and duly executed Letter of Transmittal
(or facsimile thereof), together with any required signature guarantee (or, in
the case of a book-entry transfer, an Agent's Message (as defined below)) and
any other required documents, must be received by the Depositary at one of its
addresses set forth on the back cover of this Offer to Purchase prior to the
Expiration Date and either certificates for tendered Shares must be received by
the Depositary at one of such addresses or such Shares must be delivered
pursuant to the procedure for book-entry transfer set forth below (and a
Book-Entry Confirmation (as defined below) received by the Depositary), in each
case prior to the Expiration Date, or (b) the tendering stockholder must comply
with the guaranteed delivery procedure set forth below.
 
     The Depositary will establish accounts with respect to the Shares at The
Depository Trust Company, Midwest Securities Trust Company and Philadelphia
Depository Trust Company (the "Book-Entry Transfer Facilities") for purposes of
the Offer within two business days after the date of this Offer to Purchase. Any
financial institution that is a participant in any of the Book-Entry Transfer
Facilities' systems may make book-entry delivery of Shares by causing a
Book-Entry Transfer Facility to transfer such Shares into the Depositary's
account in accordance with such Book-Entry Transfer Facility's procedures for
such transfer. However, although delivery of Shares may be effected through
book-entry transfer into the Depositary's account at a Book-Entry Transfer
Facility, the Letter of Transmittal (or facsimile thereof), properly completed
and duly executed, with any required signature guarantees, or an Agent's
Message, and any other required documents, must, in any case, be transmitted to,
and received by, the Depositary at one of its addresses set forth on the back
cover of this Offer to Purchase prior to the Expiration Date, or the tendering
 
                                       20
<PAGE>   23
 
stockholder must comply with the guaranteed delivery procedure described below.
The confirmation of a book-entry transfer of Shares into the Depositary's
account at a Book-Entry Transfer Facility as described above is referred to
herein as a "Book-Entry Confirmation". DELIVERY OF DOCUMENTS TO A BOOK-ENTRY
TRANSFER FACILITY IN ACCORDANCE WITH SUCH BOOK-ENTRY TRANSFER FACILITY'S
PROCEDURES DOES NOT CONSTITUTE DELIVERY TO THE DEPOSITARY.
 
     The term "Agent's Message" means a message transmitted by a Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that such Book-Entry Transfer Facility has
received an express acknowledgement from the participant in such Book-Entry
Transfer Facility tendering the Shares that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal and that the
Purchaser may enforce such agreement against the participant.
 
     THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY,
IS AT THE ELECTION AND RISK OF THE TENDERING STOCKHOLDER. SHARES WILL BE DEEMED
DELIVERED ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY (INCLUDING, IN THE CASE
OF A BOOK-ENTRY TRANSFER, BY BOOK-ENTRY CONFIRMATION). IF DELIVERY IS BY MAIL,
REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED.
IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.
 
     Signature Guarantees.  No signature guarantee is required on the Letter of
Transmittal if (a) the Letter of Transmittal is signed by the registered
holder(s) (which term, for purposes of this section, includes any participant in
any of the Book-Entry Transfer Facilities' systems whose name appears on a
security position listing as the owner of the Shares) of the Shares tendered
therewith and such registered holder(s) has not completed either the box
entitled "Special Payment Instructions" or the box entitled "Special Delivery
Instructions" on the Letter of Transmittal or (b) such Shares are tendered for
the account of a financial institution (including most commercial banks, savings
and loan associations and brokerage houses) that is a participant in the
Security Transfer Agents Medallion Program, the New York Stock Exchange
Medallion Signature Guarantee Program or the Stock Exchange Medallion Program
(an "Eligible Institution"). In all other cases, all signatures on the Letter of
Transmittal must be guaranteed by an Eligible Institution. See Instructions 1
and 5 to the Letter of Transmittal. If the certificates for Shares are
registered in the name of a person other than the signer of the Letter of
Transmittal, or if payment is to be made or certificates for Shares not tendered
or not accepted for payment are to be returned to a person other than the
registered holder of the certificates surrendered, the tendered certificates
must be endorsed or accompanied by appropriate stock powers, in either case
signed exactly as the name or names of the registered holders or owners appear
on the certificates, with the signatures on the certificates or stock powers
guaranteed as aforesaid. See Instructions 1 and 5 to the Letter of Transmittal.
 
     Guaranteed Delivery.  If a stockholder desires to tender Shares pursuant to
the Offer and such stockholder's certificates for Shares are not immediately
available or the procedure for book-entry transfer cannot be completed on a
timely basis or time will not permit all required documents to reach the
Depositary prior to the Expiration Date, such stockholder's tender may be
effected if all the following conditions are met:
 
          (i) such tender is made by or through an Eligible Institution;
 
          (ii) a properly completed and duly executed Notice of Guaranteed
     Delivery, substantially in the form provided by the Purchaser is received
     by the Depositary, as provided below, prior to the Expiration Date; and
 
          (iii) the certificates for all tendered Shares, in proper form for
     transfer (or a Book-Entry Confirmation with respect to such Shares),
     together with a properly completed and duly executed Letter of Transmittal
     (or facsimile thereof), with any required signature guarantees, or, in the
     case of a book-entry transfer, an Agent's Message, and any other documents
     required by the Letter of Transmittal are received by the Depositary within
     three trading days after the date of execution of such Notice of Guaranteed
     Delivery. A "trading day" is any day on which the Nasdaq National Market is
     open for business.
 
                                       21
<PAGE>   24
 
     The Notice of Guaranteed Delivery may be delivered by hand to the
Depositary or transmitted by facsimile transmission or mailed to the Depositary
and must include a guarantee by an Eligible Institution in the form set forth in
such Notice of Guaranteed Delivery.
 
     Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer will in all cases be made only after timely
receipt by the Depositary of (a) certificates for (or a timely Book-Entry
Confirmation with respect to) such Shares, (b) a Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, with any required
signature guarantees, or, in the case of book-entry transfer, an Agent's
Message, and (c) any other documents required by the Letter of Transmittal.
Accordingly, tendering stockholders may be paid at different times depending
upon when certificates for Shares or Book-Entry Confirmations with respect to
such Shares are actually received by the Depositary. UNDER NO CIRCUMSTANCES WILL
ANY INTEREST BE PAID ON THE OFFER PRICE FOR TENDERED SHARES, REGARDLESS OF ANY
EXTENSION OF THE OFFER OR ANY DELAY IN MAKING SUCH PAYMENT.
 
     The valid tender of Shares pursuant to one of the procedures described
above will constitute a binding agreement between the tendering stockholder and
the Purchaser upon the terms and subject to the conditions of the Offer.
 
     Appointment.  By executing a Letter of Transmittal as set forth above, the
tendering stockholder will irrevocably appoint designees of the Purchaser as
such stockholder's attorneys-in-fact and proxies in the manner set forth in the
Letter of Transmittal, each with full power of substitution, to the full extent
of such stockholder's rights with respect to the Shares tendered by such
stockholder and accepted for payment by the Purchaser and with respect to any
and all other Shares or other securities or rights issued or issuable in respect
of such Shares on or after August 8, 1996. All such proxies shall be considered
coupled with an interest in the tendered Shares. Such appointment will be
effective when, and only to the extent that, the Purchaser accepts for payment
Shares tendered by such stockholder as provided herein. Upon such appointment,
all prior powers of attorney and proxies given by such stockholder with respect
to such Shares or other securities or rights will, without further action, be
revoked and no subsequent powers of attorney and proxies may be given (and, if
given, will be deemed not effective). The designees of the Purchaser will
thereby be empowered to exercise all voting and other rights with respect to
such Shares or other securities or rights in respect of any annual, special or
adjourned meeting of the Company's stockholders, actions by written consent in
lieu of any such meeting or otherwise, as they in their sole discretion deem
proper. The Purchaser reserves the right to require that, in order for Shares to
be deemed validly tendered, immediately upon the Purchaser's acceptance for
payment of such Shares, the Purchaser must be able to exercise full voting,
consent and other rights with respect to such Shares and other securities or
rights, including voting at any meeting of stockholders.
 
     Determination of Validity.  All questions as to the validity, form,
eligibility (including time of receipt) and acceptance of any tender of Shares
will be determined by the Purchaser in its sole discretion, which determination
will be final and binding. The Purchaser reserves the absolute right to reject
any or all tenders determined by it not to be in proper form or the acceptance
for payment of or payment for which may, in the opinion of the Purchaser's
counsel, be unlawful. The Purchaser also reserves the absolute right to waive
any defect or irregularity in any tender of Shares of any particular
stockholder, whether or not similar defects or irregularities are waived in the
case of other stockholders. No tender of Shares will be deemed to have been
validly made until all defects or irregularities relating thereto have been
cured or waived. None of the Purchaser, the Depositary, the Information Agent,
the Dealer Manager or any other person will be under any duty to give
notification of any defects or irregularities in tenders or incur any liability
for failure to give any such notification. The Purchaser's interpretation of the
terms and conditions of the Offer (including the Letter of Transmittal and the
instructions thereto) will be final and binding.
 
     Backup Withholding.  In order to avoid "backup withholding" of Federal
income tax on payments of cash pursuant to the Offer (or pursuant to the Second
Step Merger, if consummated), a stockholder surrendering Shares in the Offer (or
pursuant to the Second Step Merger, if consummated) must, unless an exemption
applies, provide the Depositary with such stockholder's correct taxpayer
identification number ("TIN") on a Substitute Form W-9 and certify under
penalties of perjury that such TIN is correct and that
 
                                       22
<PAGE>   25
 
such stockholder is not subject to backup withholding. If a stockholder does not
provide its correct TIN or fails to provide the certifications described above,
the Internal Revenue Service ("IRS") may impose a penalty on such stockholder
and payment of cash to such stockholder pursuant to the Offer (or pursuant to
the Second Step Merger, if consummated) may be subject to backup withholding at
a rate of 31%. All stockholders surrendering Shares pursuant to the Offer (or
pursuant to the Second Step Merger, if consummated) should complete and sign the
Substitute Form W-9 included as part of the Letter of Transmittal to provide the
information and certification necessary to avoid backup withholding (unless an
applicable exemption exists and is proved in a manner satisfactory to the
Purchaser and the Depositary). Certain stockholders (including, among others,
all corporations and certain foreign individuals and entities) are not subject
to backup withholding. Noncorporate foreign stockholders should complete and
sign a Form W-8, Certificate of Foreign Status, a copy of which may be obtained
from the Depositary, in order to avoid backup withholding. See Instruction 9 to
the Letter of Transmittal. For other Federal income tax consequences, see
"Special Factors -- Certain Federal Income Tax Consequences".
 
WITHDRAWAL RIGHTS
 
     Except as otherwise provided below, tenders of Shares will be irrevocable.
Shares tendered pursuant to the Offer may be withdrawn pursuant to the
procedures set forth below at any time prior to the Expiration Date and, unless
theretofore accepted for payment and paid for by the Purchaser pursuant to the
Offer, may also be withdrawn at any time after Friday, October 11, 1996.
 
     For a withdrawal to be effective, a written or facsimile transmission
notice of withdrawal must be timely received by the Depositary at one of its
addresses set forth on the back cover of this Offer to Purchase and must specify
the name of the person having tendered the Shares to be withdrawn, the number of
Shares to be withdrawn and the name of the registered holder of the Shares to be
withdrawn, if different from the name of the person who tendered the Shares. If
certificates for Shares have been delivered or otherwise identified to the
Depositary, then, prior to the physical release of such certificates, the serial
numbers shown on such certificates must be submitted to the Depositary and,
unless such Shares have been tendered by an Eligible Institution, the signatures
on the notice of withdrawal must be guaranteed by an Eligible Institution. If
Shares have been delivered pursuant to the procedures for book-entry transfer as
set forth under "-- Procedure for Tendering Shares" above, any notice of
withdrawal must also specify the name and number of the account at the
appropriate Book-Entry Transfer Facility to be credited with the withdrawn
Shares and otherwise comply with such Book-Entry Transfer Facility's procedures.
Withdrawals of tenders of Shares may not be rescinded, and any Shares properly
withdrawn will thereafter be deemed not validly tendered for any purposes of the
Offer. However, withdrawn Shares may be retendered by again following one of the
procedures described under "-- Procedure for Tendering Shares" above at any time
prior to the Expiration Date.
 
     All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by the Purchaser in its sole
discretion, which determination will be final and binding. None of the
Purchaser, the Depositary, the Information Agent, the Dealer Manager, or any
other person will be under any duty to give notification of any defects or
irregularities in any notice of withdrawal or incur any liability for failure to
give any such notification.
 
ACCEPTANCE FOR PAYMENT AND PAYMENT
 
     Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any such extension
or amendment), the Purchaser will accept for payment and will pay for all Shares
validly tendered prior to the Expiration Date, and not properly withdrawn in
accordance with the procedures set forth in "-- Withdrawal Rights" above,
promptly after the Expiration Date. Any determination concerning the
satisfaction of such terms and conditions will be within the sole discretion of
the Purchaser and such determination will be final and binding on all tendering
stockholders. See "-- Terms of the Offer" above and "-- Certain Conditions of
the Offer" below. The Purchaser expressly reserves the right, in its sole
discretion, to delay acceptance for payment of or payment for Shares in order to
comply in whole or in part with any applicable law. Any such delays will be
effected in compliance with Rule 14e-1(c) under the
 
                                       23
<PAGE>   26
 
Exchange Act, which requires that a bidder pay the consideration offered or
return tendered Shares promptly after the termination or withdrawal of the
Offer.
 
     Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer will in all cases be made only after timely
receipt by the Depositary of (a) certificates for (or a timely Book-Entry
Confirmation with respect to) such Shares, (b) a Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, with any required
signature guarantees, or, in the case of book-entry transfer, an Agent's
Message, and (c) any other documents required by the Letter of Transmittal.
Accordingly, tendering stockholders may be paid at different times depending
upon when certificates for Shares or Book-Entry Confirmations are actually
received by the Depositary. The per Share consideration paid to any stockholder
pursuant to the Offer will be the highest per Share consideration paid to any
other stockholder pursuant to the Offer.
 
     For purposes of the Offer, the Purchaser will be deemed to have accepted
for payment, and thereby purchased, Shares properly tendered to the Purchaser
and not withdrawn as, if and when the Purchaser gives oral or written notice to
the Depositary of the Purchaser's acceptance for payment of such Shares. Payment
for Shares accepted for payment pursuant to the Offer will be made by deposit of
the Offer Price therefor with the Depositary, which will act as agent for
tendering stockholders for the purpose of receiving payment from the Purchaser
and transmitting payment to tendering stockholders. UNDER NO CIRCUMSTANCES WILL
ANY INTEREST BE PAID ON THE OFFER PRICE FOR TENDERED SHARES, REGARDLESS OF ANY
EXTENSION OF THE OFFER OR ANY DELAY IN MAKING SUCH PAYMENT.
 
     If the Purchaser is delayed in its acceptance for payment of or payment for
Shares or is unable to accept for payment or pay for Shares pursuant to the
Offer for any reason, then, without prejudice to the Purchaser's rights under
the Offer (but subject to compliance with Rule 14e-1(c) under the Exchange Act,
which requires that a tender offeror pay the consideration offered or return the
tendered securities promptly after termination or withdrawal of a tender offer),
the Depositary may, nevertheless, on behalf of the Purchaser, retain tendered
Shares, and any such Shares may not be withdrawn except to the extent tendering
stockholders are entitled to exercise, and duly exercise, withdrawal rights as
described under "-- Withdrawal Rights" above.
 
     If any tendered Shares are not purchased pursuant to the Offer for any
reason, certificates for any such Shares will be returned, at the expense of the
Purchaser, to the tendering stockholder (or, in the case of Shares delivered by
book-entry transfer of such Shares into the Depositary's account at a Book-Entry
Transfer Facility pursuant to the procedure set forth under "-- Procedure for
Tendering Shares" above, such Shares will be credited to an account maintained
at the appropriate Book-Entry Transfer Facility), as promptly as practicable
after the expiration or termination of the Offer.
 
     The Purchaser reserves the right to transfer or assign, in whole or from
time to time in part, the right to purchase Shares tendered pursuant to the
Offer, but any such transfer or assignment will not relieve the Purchaser of its
obligations under the Offer and will in no way prejudice the rights of tendering
stockholders to receive payment for Shares validly tendered and accepted for
payment pursuant to the Offer.
 
                                       24
<PAGE>   27
 
PRICE RANGE OF THE SHARES; DIVIDENDS
 
     The Shares are included in the Nasdaq National Market and are traded under
the symbol ROTO. The range of the high and low market prices for the Shares and
dividends paid per Share for each quarter of 1994 and of 1995 and for the first
three quarters of 1996 is set forth below.
 
<TABLE>
<CAPTION>
                                                                                DIVIDEND PAID
                                                              HIGH      LOW       PER SHARE
                                                              -----    -----    -------------
    <S>                                                       <C>      <C>       <C>
    1994
         First Quarter......................................  $32      $28          $0.14
         Second Quarter.....................................   32       24           0.14
         Third Quarter......................................   26 1/2   22 1/2       0.15
         Fourth Quarter.....................................   25 3/4   19 1/2       0.15
    1995
         First Quarter......................................  $28      $19 1/2      $0.15
         Second Quarter.....................................   28 1/2   24 1/2       0.15
         Third Quarter......................................   37       28           0.17
         Fourth Quarter.....................................   37 3/4   30 1/2       0.17
    1996
         First Quarter......................................  $33 3/4  $30          $0.17
         Second Quarter.....................................   41 1/2   30 3/4       0.17
         Third Quarter through August 12, 1996..............   42       33 1/2       0.00
</TABLE>
 
     On August 7, 1996, the last full trading day before the first public
announcement of the Offer, the last reported sale price of the Shares on the
Nasdaq National Market was $36.50 per Share. The last reported bid price for the
Shares on August 7, 1996 was $34.00 per Share. The Purchaser expects the
Roto-Rooter Board to declare a dividend of $0.20 per Share to be paid in
September 1996 to holders of Shares on the Record Date.
 
     STOCKHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR THE SHARES.
 
CERTAIN EFFECTS OF THE OFFER
 
     Market for the Shares.  The purchase of Shares pursuant to the Offer will
reduce the number of holders of Shares and the number of Shares that might
otherwise trade publicly and could adversely affect the liquidity and market
value of the remaining Shares held by the public.
 
     Stock Quotation.  Depending upon the number of Shares purchased pursuant to
the Offer, the Shares may no longer meet the requirements of the NASD for
continued inclusion in the Nasdaq National Market, which among other things
requires that an issuer have at least 200,000 publicly held shares, held by at
least 400 stockholders or 300 stockholders of round lots, with a market value of
at least $1,000,000. If these standards are not met, the Shares might
nevertheless continue to be included in the Nasdaq National Market with
quotations published in the Nasdaq "additional list" or in one of the "local
lists", but if the number of holders of the Shares were to fall below 300, or if
the number of publicly held Shares were to fall below 100,000 or there were not
at least two registered and active market makers for the Shares, the NASD's
rules provide that the Shares would no longer be "qualified" for Nasdaq National
Market reporting and the Nasdaq National Market would cease to provide any
quotations. Shares held directly or indirectly by directors, officers or
beneficial owners of more than 10% of the Shares are not considered as being
publicly held for this purpose. According to the Company's June 30 Form 10-Q,
there were 5,172,963 Shares issued and outstanding as of August 13, 1996. If, as
a result of the purchase of Shares pursuant to the Offer or otherwise, the
Shares no longer meet the requirements of the NASD for continued inclusion in
the Nasdaq National Market or in any other tier of the Nasdaq National Market
and the Shares are no longer included in the Nasdaq Stock Market or in any other
tier of the Nasdaq Stock Market, as the case may be, the market for Shares could
be adversely affected.
 
                                       25
<PAGE>   28
 
     In the event that the Shares no longer meet the requirements of the NASD
for continued inclusion in any tier of the Nasdaq Stock Market, it is possible
that the Shares would continue to trade in the over-the-counter market and that
price quotations would be reported by other sources. The extent of the public
market for the Shares and the availability of such quotations would, however,
depend upon the number of holders of Shares remaining at such time, the
interests in maintaining a market in Shares on the part of securities firms, the
possible termination of registration of the Shares under the Exchange Act, as
described below, and other factors.
 
     Exchange Act Registration.  The Shares are currently registered under
Section 12(g) of the Exchange Act. Registration of the Shares under the Exchange
Act may be terminated upon application of the Company to the Commission if the
Shares are not listed on a national securities exchange, quoted on an automated
inter-dealer quotation system or held by 300 or more holders of record.
Termination of registration of the Shares under the Exchange Act would
substantially reduce the information required to be furnished by the Company to
its stockholders and to the Commission and would make certain provisions of the
Exchange Act no longer applicable to the Company, such as the short-swing profit
recovery provisions of Section 16(b) of the Exchange Act, the requirement of
furnishing a proxy statement pursuant to Section 14(a) of the Exchange Act in
connection with stockholders' meetings and the related requirement of furnishing
an annual report to stockholders and the requirements of Rule 13e-3 under the
Exchange Act with respect to "going private" transactions. Furthermore, the
ability of "affiliates" of the Company and persons holding "restricted
securities" of the Company to dispose of such securities pursuant to Rule 144 or
144A promulgated under the Securities Act of 1933, may be impaired or
eliminated.
 
     Margin Regulations.  The Shares are currently "margin securities" under the
regulations of the Board of Governors of the Federal Reserve System (the
"Federal Reserve Board"), which has the effect, among other things, of allowing
brokers to extend credit on the collateral of the Shares. Depending upon factors
similar to those described above regarding listing and market quotations, it is
possible that, following the Offer, the Shares would no longer constitute
"margin securities" for the purposes of the margin regulations of the Federal
Reserve Board and therefore could no longer be used as collateral for loans made
by brokers. In any event, the Shares will cease to be "margin securities" if
registration of the Shares under the Exchange Act is terminated.
 
     Unless the Second Step Merger is consummated, the Purchaser currently does
not intend to propose or seek to have the Shares delisted from the Nasdaq
National Market or to terminate the registration of the Shares under the
Exchange Act. However, delisting of the Shares may still occur at the
instigation of the NASD due to the reduced number of Shares or holders thereof
then outstanding. See "Special Factors -- Purpose and Structure of the Offer;
Plans for the Company After the Offer" above.
 
     Increased Interest in Net Book Value and Net Earnings of the Company.  In
the event that the Offer is consummated, the interest of the Purchaser in the
net book value and net earnings of the Company, in terms of both percentages and
dollar amounts, will increase in direct proportion to the increase in the
percentage of outstanding Shares owned by the Purchaser resulting from the Share
acquisitions pursuant to the Offer. If all of the outstanding Shares are
purchased pursuant to the Offer, the Purchaser's beneficial interest in the net
book value at June 30, 1996 and net earnings of the Company for the six months
ended June 30, 1996, as reflected in the Company's June 30 Form 10-Q would
increase to 100%, or $79,106,000 and $5,344,000, respectively.
 
     Tax Sharing Agreement.  In the event the Offer is consummated and the
Purchaser owns 80% or more (but less than 100%) of the outstanding Shares, the
Purchaser intends to enter into a Federal income tax sharing agreement with the
Company and the Company's subsidiaries on customary terms. Such agreement is
expected to provide for the filing of consolidated Federal income tax returns
and would require the Company and its subsidiaries to make payments to the
Purchaser in amounts equal to their tax liabilities computed on a separate
basis. If the Company and its subsidiaries generate losses or credits which
actually reduce the Purchaser's consolidated Federal income tax liability or
which would have resulted in a refund on a separate company basis during the
period the Company and its subsidiaries are members of the affiliated group,
such agreement would generally require the Purchaser to pay to the Company and
its subsidiaries the amount of
 
                                       26
<PAGE>   29
 
such reduction or refund. Such agreements would also address the timing of such
payments, the resolution of tax disputes and other similar matters.
 
CERTAIN INFORMATION CONCERNING THE COMPANY
 
     The Company was incorporated in Delaware on September 28, 1983 as a wholly
owned subsidiary of the Purchaser, and on August 31, 1984, succeeded to the
business of the Purchaser's Roto-Rooter Group, the substantial portion of which
business the Purchaser acquired in 1980. In September 1984, the Company sold in
a private placement 719,991 Shares, and in June 1985, the Purchaser sold in a
public offering 1,100,000 Shares. As of the date hereof, the Purchaser owned
2,990,333 Shares, which Shares represent approximately 58% of the outstanding
Shares.
 
     The Company conducts its business in one business segment. All significant
revenues relate to providing repair and maintenance services to residential,
commercial, industrial and municipal customers through both company-owned and
franchised operations.
 
     The Company is the largest provider of sewer and drain cleaning services in
the United States. The Company provides sewer and drain cleaning and plumbing
repair and maintenance services through company-owned operations and franchised
operations located in all 50 states, Canada and Japan. The Company also
manufactures and purchases for resale sewer and drain cleaning equipment, cable,
and other products and accessories for its company-owned operations and for sale
to its independent franchisees. The Company is one of the oldest franchising
businesses in the United States, having established its first franchise in 1936.
In August 1991, the Company and the Purchaser, respectively, purchased 70% and
30% of Service America. See "Special Factors -- Interests of Certain Persons;
Stockholdings of Certain Officers and Directors; and Related Transactions". As a
percent of total operating revenue, sewer and drain cleaning repair and
maintenance services represent 32%, plumbing repair and maintenance services
represent 24%, air conditioning and appliance repair and maintenance services
represent 32%, and all other classes represent 12%.
 
     The Company's principal offices are located at 2500 Chemed Center, 255 E.
Fifth Street, Cincinnati, Ohio 45202.
 
     Set forth below is a summary of certain selected financial information with
respect to the Company for the six months ended June 30, 1996 and June 30, 1995,
and for the years ended December 31, 1995 and 1994. The June 30, 1996
information was excerpted from the Company's June 30 Form 10-Q. The June 30,
1995 information was excerpted from the Company's Quarterly Report on Form 10-Q
for the quarter ended June 30, 1995, and the December 31, 1995 and 1994
information was excerpted from the Company's Annual Report on Form 10-K for the
fiscal year ended December 31, 1995 (the "Company's 1995 Form 10-K"). More
comprehensive financial information is included in the Company's June 30 Form
10-Q, the Company's 1995 Form 10-K and such other financial information
(including any related notes) contained therein. The Company's June 30 Form 10-Q
and the Company's 1995 Form 10-K may be inspected and copies may be obtained in
the manner set forth below.
 
                                       27
<PAGE>   30
 
                               ROTO-ROOTER, INC.
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                 SIX MONTHS ENDED            YEAR ENDED
                                                     JUNE 30,               DECEMBER 31,
                                              ----------------------    ---------------------
                                                1996         1995         1995         1994
                                              ---------    ---------    --------     --------
    <S>                                       <C>          <C>          <C>          <C>
    Income Statement Data:
      Sales and Operating Revenues..........  $  97,821    $  86,998    $179,772     $171,930
      Net Income............................      5,344        4,476       9,677(a)     8,771
      Earnings Per Share....................  $    1.04    $    0.88    $   1.90(a)  $   1.73
    Balance Sheet Data:
      Total Assets..........................  $ 154,083    $ 143,489    $149,869     $137,383
      Total Liabilities.....................     74,977       72,321      74,883       69,636
      Stockholders' Equity..................     79,106       71,168      74,986       67,747
</TABLE>
 
- ---------------
(a) Excludes nonrecurring expense of $538,000 pretax ($355,000 after tax or $.07
    per Share) of legal, investment banking and other expenses relating to the
    Purchaser's attempted acquisition of the outstanding Shares in 1995.
 
     The book value per Share as of June 30, 1996 was $15.29 and as of December
31, 1995 was $14.60.
 
CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS:
 
     CERTAIN MATTERS DISCUSSED HEREIN ARE FORWARD-LOOKING STATEMENTS THAT
INVOLVE RISKS AND UNCERTAINTIES. Forward-looking statements include the
information set forth above under "Special Factors -- Opinion of Financial
Advisor" concerning the Roto-Rooter Projections and the information set forth
below concerning the Company's 1996 Mid-Year Estimate (the "MYE") and the
Company's 1996 Business Plan (the "1996 Business Plan"). To that extent, the
Purchaser claims the protection of the disclosure liability safe harbor for
forward-looking statements contained in the Private Securities Litigation Reform
Act of 1995. Such information has been included in this Offer to Purchase for
the limited purpose of giving Roto-Rooter stockholders access to financial
projections on Roto-Rooter that were made available to Chemed directors. Such
information was prepared by Roto-Rooter management for internal use and not with
a view to publication. Readers are cautioned that the following factors may
cause the Company's actual financial performance to differ materially from those
expressed in such forward-looking statements: a deterioration in general
economic conditions, which may result in reduced demand for the Company's
services; unexpected increases in operating expenses; an increase in
competition, which may result in reduced revenue or increased promotional
expenses; the Company's need to improve its relationships with its franchisees;
and the general interest rate environment, because the Company is expected to
realize significant interest income from its holdings of cash and
interest-bearing securities.
 
     The MYE for 1996 and comparison of such estimate with the Company's 1995
performance and 1996 budget was prepared for and provided to members of the
Roto-Rooter Board at its August 7, 1996 meeting.
 
                                       28
<PAGE>   31
 
                               ROTO-ROOTER, INC.
 
                             1996 MID-YEAR ESTIMATE
                               FINANCIAL SUMMARY
                      (IN THOUSANDS EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                           1995         1996         1996
                                                         (ACTUAL)     (BUDGET)       (MYE)
                                                         --------     --------     ---------
    <S>                                                  <C>          <C>          <C>
    (1) Net Sales......................................  $179,722     $199,181     $ 202,685
    (2) Operating Profit...............................    18,851(a)    21,974        21,888
    (3) Pretax Profit..................................    17,375(a)    20,691        20,757
    (4) Net Income.....................................    10,032(a)    11,620        11,862
                                                         --------     --------      --------
    (5) Earnings Per Share.............................      1.97(a)      2.27          2.30
                                                         --------     --------      --------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                       MARGINS
                                                         -----------------------------------
    <S>                                                  <C>          <C>          <C>
    (6) Operating Profit...............................      10.5%        11.0%         10.8%
    (7) Pretax Profit..................................       9.7         10.4          10.2
    (8) Net Income.....................................       5.6          5.8           5.9
</TABLE>
 
- ---------------
(a) Excludes nonrecurring expenses of $538,000 pretax ($355,000 after tax and
     seven cents per share) related to the Purchaser's attempted acquisition of
     the outstanding Shares in 1995.
 
     The MYE contained the following commentary regarding the estimates:
 
          (1) The Company is projecting 1996 net sales of $202,685,000 or 12.5%
     above 1995 net sales.
 
          (2) Operating profit in 1996 is projected by the Company's management
     to increase to $21,888,000, which would be $3,037,000 or 16.1% above full
     year 1995 and $86,000 or 0.4% below budget. The operating profit margin for
     1996 is expected by the Company's management to reach 10.8%, or 0.3
     percentage points above prior year and 0.2 percentage points below budget.
 
          (3) As a result of higher interest income, pretax profit is expected
     by the Company's management to reach $20,757,000 in 1996, which would be
     19.5% above full year 1995 and 0.3% above budget. Net income for 1996 is
     expected by the Company's management to be $11,862,000 or 18.2% above prior
     year and 2.1% above budget. Earnings per share are expected by the
     Company's management to reach $2.30 for 1996 or 16.8% above prior year and
     1.3% above budget.
 
          (4) According to the Company's management, the key issues for
     achieving the full year 1996 forecast are continued sewer/drain cleaning
     and plumbing revenue growth, higher levels of new service contract sales
     and renewal rates of existing contracts, a successful resolution of
     outstanding issues related to the lawsuit with the Roto-Rooter Franchise
     Association (which lawsuit is described on pages 4 and 5 of the Company's
     1995 Form 10-K), continued cost control in all business units and continued
     generation of excess cash from operations.
 
     The following information was excerpted or derived from the 1996 Business
Plan. The 1996 Business Plan was prepared for and presented to members of the
Roto-Rooter Board in December 1995. The 1996 Business Plan has not been updated
by the Company since that time and therefore the information set forth below may
no longer reflect the Company's financial position or prospects and has been
included herein solely for informational purposes.
 
                                       29
<PAGE>   32
 
                               ROTO-ROOTER, INC.
 
                               1996 BUSINESS PLAN
                               FINANCIAL SUMMARY
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                           1997         1998         1999         2000
                                                        (FORECAST)   (FORECAST)   (FORECAST)   (FORECAST)
                                                        ----------   ----------   ----------   ----------
<S>                                                     <C>          <C>          <C>          <C>
(1) Net Sales.........................................   $ 221,416    $ 247,763    $ 277,690    $ 311,616
(2) Operating Profits.................................      24,958       27,898       30,982       34,329
(3) Pretax Profit.....................................      24,260       28,075       32,651       37,933
(4) Net Income........................................      13,507       15,723       18,394       21,495
(5) Earnings Per Share................................        2.62         3.03         3.53         4.10
</TABLE>
 
<TABLE>
<CAPTION>
                                                                             MARGINS
                                                        -------------------------------------------------
<S>                                                     <C>          <C>          <C>          <C>
(6) Operating Profit..................................        11.0%        11.3%        11.3%        11.2%
(7) Pretax Profit.....................................        10.4         11.0         11.3         11.8
(8) Net Income........................................         5.8          6.1          6.3          6.6
</TABLE>
 
     The Company is subject to the information reporting requirements of the
Exchange Act and, in accordance therewith, is required to file reports relating
to its business, financial condition and other matters. Information as of
particular dates concerning the Company's directors and officers, their
remuneration, stock options and other matters, the principal holders of the
Company's securities and any material interest of such persons in transactions
with the Company is required to be disclosed in proxy statements distributed to
the Company's stockholders and filed with the Commission. Such reports, proxy
statements and other information at the public reference facilities are
maintained by the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549
and should also be available for inspection and copying at the regional offices
of the Commission located in Northwestern Atrium Center, 500 West Madison
Street, Suite 1400, Chicago, IL 60601 and 7 World Trade Center, 13th Floor, New
York, NY 10048. Copies of such material may also be obtained from the Public
Reference Room of the Commission in Washington, D.C. at prescribed rates. Such
material should also be available for inspection at the offices of Nasdaq
Operations, 1735 K Street, N.W., Washington, DC 20006.
 
CERTAIN INFORMATION CONCERNING THE PURCHASER
 
     The Purchaser is a Delaware corporation that was incorporated on March 26,
1970. Its principal executive offices are located at 2600 Chemed Center, 255 E.
Fifth Street, Cincinnati, OH 45202. The Purchaser is a diversified public
corporation with strategic positions in sanitary-maintenance-product
distribution services (National Sanitary Supply); plumbing, drain cleaning, and
residential appliance and air-conditioning repair (Roto-Rooter); medical and
dental disposable-product supply for the alternate-care and hospital markets
(Omnia); and home healthcare services (Patient Care). Relative contributions to
operating profit are 31%, 41%, 15% and 13%, respectively. The Purchaser's
business segments are defined as follows:
 
          (a) the National Sanitary Supply segment includes the consolidated
     operations of National Sanitary Supply Company, an 84%-owned subsidiary,
     which sells and distributes sanitary maintenance and paper supplies
     including cleaners, floor finishes, hand soaps, paper towels and tissues,
     cleaning equipment, packaging supplies, business paper and general
     maintenance products used by commercial, institutional and industrial
     businesses;
 
          (b) the Roto-Rooter segment includes the consolidated operations of
     the Company, which provides repair and maintenance services to residential
     and commercial accounts. Such services include sewer, drain and pipe
     cleaning, plumbing services and appliance repair and maintenance and are
     delivered through company-owned and franchised locations. The Company also
     manufactures and sells certain products and equipment used to provide such
     services;
 
                                       30
<PAGE>   33
 
          (c) the Omnia segment (formerly Veratex) includes the combined
     operations of the 100%-owned businesses comprising the Purchaser's Omnia
     Group, which manufactures medical and dental supplies and distributes them
     to dealers throughout the United States. Products include disposable paper,
     cotton and gauze proprietary products and various other dental and medical
     supplies; and
 
          (d) the Patient Care segment includes the consolidated operations of
     the 100%-owned businesses comprising the Purchaser's Patient Care Group,
     which offers complete, professional home-healthcare services in the New
     York-New Jersey-Connecticut area. Services provided to patients at home
     include skilled nursing; home health aides; physical, speech, respiratory
     and occupational therapies; medical social work, nutrition; and other
     specialized services.
 
     The name, citizenship, business address, present principal occupation or
employment and five-year employment history of each of the directors and
executive officers of the Purchaser is set forth in Schedule I hereto and
incorporated herein by reference.
 
     During the last five years, neither the Purchaser nor, to the Purchaser's
knowledge, any person named in Schedule I hereto has been convicted in a
criminal proceeding (excluding traffic violations or similar misdemeanors) nor
has been a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction as a result of which such person was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
or mandating activities subject to, Federal or state securities laws or finding
any violation of such laws.
 
     Set forth below is a summary of certain selected financial information with
respect to the Purchaser for the six months ended June 30, 1996 and June 30,
1995, and for the years ended December 31, 1995 and 1994. The June 30, 1996
information was excerpted from the Purchaser's Quarterly Report on Form 10-Q for
the quarter ended June 30, 1996 (the "Purchaser's June 30 Form 10-Q"), the June
30, 1995 information was excerpted from the Purchaser's Quarterly Report on Form
10-Q for the quarter ended June 30, 1995, and the December 31, 1995 and 1994
information was excerpted from the Purchaser's Annual Report on Form 10-K for
the fiscal year ended December 31, 1995 (the "Purchaser's 1995 Form 10-K"). More
comprehensive financial information is included in the Purchaser's June 30 Form
10-Q, the Purchaser's 1995 Form 10-K and such other financial information
(including any related notes) contained therein. The Purchaser's June 30 Form
10-Q and the Purchaser's 1995 Form 10-K can be inspected and copies may be
obtained in the manner set forth below.
 
                               CHEMED CORPORATION
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                 SIX MONTHS ENDED             YEAR ENDED
                                                     JUNE 30,                DECEMBER 31,
                                              ----------------------    ----------------------
                                                1996         1995         1995         1994
                                              ---------    ---------    ---------    ---------
    <S>                                       <C>          <C>          <C>          <C>
    Income Statement Data:
      Sales and Service Revenues............  $ 337,932    $ 347,202    $ 699,165    $ 645,027
         Income From Continuing
           Operations.......................     17,885       10,690       20,439       14,532
         Income From Discontinued
           Operations.......................         --          901        2,743       29,390
         Net Income.........................     17,885       11,591       23,182       43,922
         Earnings Per Share
              Income from Continuing
                Operations..................  $    1.82    $    1.08    $    2.07    $    1.47
              Net Income....................  $    1.82    $    1.17    $    2.35    $    4.46
    Balance Sheet Data:
      Total Assets..........................  $ 519,908    $ 512,573    $ 531,868    $ 505,483
      Total Liabilities.....................    308,655      318,648      323,211      319,163
      Stockholders' Equity..................    211,253      193,925      208,657      186,320
</TABLE>
 
                                       31
<PAGE>   34
 
     The Purchaser is subject to the information reporting requirements of the
Exchange Act and, in accordance therewith, is required to file reports relating
to its business, financial condition and other matters. Information as of
particular dates concerning the Purchaser's directors and officers, their
renumeration, stock options and other matters, the principal holders of the
Purchaser's securities and any material interest of such persons in transactions
with the Purchaser is disclosed in proxy statements distributed to the
Purchaser's stockholders and filed with the Commission. Such reports, proxy
statements and other information may be examined, and copies may be obtained
from the Commission, in the manner set forth under "-- Certain Information
Concerning the Company" above. Such information should also be available for
inspection at the New York Stock Exchange, 20 Broad Street, New York, NY 10005.
 
SOURCE AND AMOUNT OF FUNDS
 
     The Purchaser estimates that the total amount of funds required to (a)
purchase pursuant to the Offer the number of Shares that are outstanding on a
fully diluted basis (excluding Shares held by the Purchaser) and (b) pay fees
and expenses related to the Offer will be approximately $91,048,562. All funds
needed for the Offer will be obtained either from the Purchaser's cash on hand
or from borrowings under the Purchaser's $85,000,000 revolving credit facility
with Bank of America National Trust and Savings Association, as agent, along
with certain participating other banks, which was entered into on June 20, 1996
and replaced the Purchaser's then outstanding credit facilities (the "Credit
Facility").
 
     The Credit Facility allows borrowings of up to $85,000,000, with an
interest rate based on quoted market rates plus a margin and continues in place
up to June 20, 2001. The Purchaser is currently borrowing $25,000,000 under the
Credit Facility at an interest rate of 5.6975%. Borrowings under the Credit
Facility are subject to maintaining certain financial covenants. The Purchaser
is currently in compliance with such covenants. The Credit Facility contains a
negative pledge pursuant to which the Purchaser has agreed not to create, incur,
assume or permit to exist certain liens on its assets, including the 2,990,333
Shares that it owns. The Purchaser plans to repay borrowings under the Credit
Facility with cash flows from its operations.
 
DIVIDENDS AND DISTRIBUTIONS
 
     As discussed in "Introduction", the Purchaser expects the Roto-Rooter Board
to declare the Third Quarter Dividend. Holders of record of the Shares on the
Record Date will be entitled to receive the Third Quarter Dividend whether or
not they tender their Shares pursuant to the Offer, and no adjustment will be
made to the Offer Price or to any other terms of the Offer as a result of the
payment of such Third Quarter Dividend to such stockholders.
 
     If, on or after August 8, 1996, the Company should (a) split, combine or
otherwise change the Shares or its capitalization, (b) acquire or otherwise
cause a reduction in the number of outstanding Shares or other securities or (c)
issue or sell additional Shares, shares of any other class of capital stock,
other voting securities or any securities convertible into or exchangeable for,
or rights, warrants or options, conditional or otherwise, to acquire, any of the
foregoing, then subject to the provisions set forth in "-- Certain Conditions to
the Offer" below, the Purchaser, in its sole discretion, may make such
adjustments as it deems appropriate in the Offer Price and other terms of the
Offer, including, without limitation, the number or type of securities offered
to be purchased.
 
     If, on or after August 8, 1996, the Company should declare or pay any cash
dividend on the Shares or other distribution on the Shares (other than the Third
Quarter Dividend), or issue with respect to the Shares any additional Shares,
shares of any other class of capital stock, other voting securities or any
securities convertible into, or rights, warrants or options, conditional or
otherwise, to acquire, any of the foregoing, payable or distributable to
stockholders of record on a date prior to the transfer of the Shares purchased
pursuant to the Offer to the Purchaser or its nominee or transferee on the
Company's stock transfer records, then, subject to the provisions set forth in
"-- Certain Conditions to the Offer" below, (a) the Offer Price may, in the sole
discretion of the Purchaser, be reduced by the amount of any such cash dividend
or cash distribution and (b) the whole of any such noncash dividend,
distribution or issuance to be received by the tendering stockholders will (i)
be received and held by the tendering stockholders for the account of the
 
                                       32
<PAGE>   35
 
Purchaser and will be required to be promptly remitted and transferred by each
tendering stockholder to the Depositary for the account of the Purchaser,
accompanied by appropriate documentation of transfer, or (ii) at the direction
of the Purchaser, be exercised for the benefit of the Purchaser, in which case
the proceeds of such exercise will promptly be remitted to the Purchaser.
Pending such remittance and subject to applicable law, the Purchaser will be
entitled to all rights and privileges as owner of any such noncash dividend,
distribution, issuance or proceeds and may withhold the entire Offer Price or
deduct from the Offer Price the amount of value thereof, as determined by the
Purchaser in its sole discretion.
 
CERTAIN CONDITIONS OF THE OFFER
 
     Notwithstanding any other term or provision of the Offer, the Purchaser
will not be required to accept for payment or, subject to any applicable rules
and regulations of the Commission, including Rule 14e-1(c) under the Exchange
Act (relating to the Purchaser's obligation to pay for or return tendered Shares
promptly after termination or withdrawal of the Offer), pay for and may delay
the acceptance for payment of or, subject to the restriction referred to above,
the payment for any tendered Shares and may terminate the Offer as to any Shares
not then paid for, if at any time on or after August 8, 1996 and prior to the
time of acceptance for payment of or payment for any such Shares, any of the
following conditions exist:
 
          (a)  there shall be threatened, instituted or pending any action,
     proceeding, application or counterclaim by any government or governmental,
     regulatory or administrative authority or agency, domestic, foreign or
     supranational (each, a "Government Entity"), or by any other person,
     domestic or foreign, before any court or Governmental Entity, (i)
     challenging or seeking to, or which is reasonably likely to, make illegal,
     delay or otherwise directly or indirectly restrain or prohibit, or seeking
     to, or which is reasonably likely to, impose voting, procedural, price or
     other requirements, in connection with, the making of the Offer, the
     acceptance for payment of, or payment for, some of or all the Shares by the
     Purchaser or any affiliate of the Purchaser, (ii) seeking to prohibit or
     limit the ownership or operation by the Purchaser or any affiliate of the
     Purchaser of any portion of the business or assets of the Company and its
     subsidiaries or of the Purchaser or any affiliate of the Purchaser or to
     compel the Purchaser or any affiliate of the Purchaser to dispose of or
     hold separate all or any portion of the business or assets of the Company
     or any of its subsidiaries or of the Purchaser or any affiliate of the
     Purchaser or seeking to impose any limitation on the ability of the
     Purchaser or any affiliate of the Purchaser to conduct such business or own
     such assets, (iii) seeking to impose or confirm limitations on the ability
     of the Purchaser or any affiliate of the Purchaser effectively to exercise
     full rights of ownership of the Shares, including, without limitation, the
     right to vote any Shares acquired or owned by the Purchaser or any
     affiliate of the Purchaser on all matters properly presented to the
     Company's stockholders, (iv) seeking to require divestiture by the
     Purchaser or any affiliate of the Purchaser of any Shares, (v) seeking any
     material diminution in the benefits expected to be derived by the Purchaser
     or any affiliate of the Purchaser as a result of the transactions
     contemplated by the Offer, (vi) otherwise directly or indirectly relating
     to the Offer or which otherwise, in the reasonable judgment of the
     Purchaser, might materially adversely affect the Company or any of its
     subsidiaries or the Purchaser or any affiliate of the Purchaser or the
     value of the Shares or (vii) in the reasonable judgment of the Purchaser,
     materially adversely affecting the business, properties, assets,
     liabilities, capitalization, stockholders' equity, condition (financial or
     otherwise), operations, licenses or franchises, results of operations or
     prospects of the Company or any of its subsidiaries;
 
          (b)  there shall be any action taken, or any statute, rule,
     regulation, legislation, interpretation, judgment, order or injunction
     proposed, enacted, enforced, promulgated, amended, issued or deemed
     applicable to (i) the Purchaser or any affiliate of the Purchaser or the
     Company or any of its subsidiaries or (ii) the Offer or any merger or other
     similar business combination by the Purchaser or any affiliate of the
     Purchaser with the Company, by any government, legislative body or court,
     domestic, foreign or supranational, or Governmental Entity, that, in the
     reasonable judgment of the Purchaser, might, directly or indirectly, result
     in any of the consequences referred to in clauses (i) through (vii) of
     paragraph (a) above;
 
                                       33
<PAGE>   36
 
          (c)  any change shall have occurred or been threatened (or any
     condition, event or development shall have occurred or been threatened
     involving a prospective change) in the business, properties, assets,
     liabilities, capitalization, stockholders' equity, condition (financial or
     otherwise), operations, licenses or franchises, results of operations or
     prospects of the Company or any of its subsidiaries that, in the reasonable
     judgment of the Purchaser, is or may be materially adverse to the Company
     or any of its subsidiaries or to the value of the Shares to the Purchaser
     or any affiliate of the Purchaser, or the Purchaser shall have become aware
     of any facts that, in the reasonable judgment of the Purchaser, have or may
     have material adverse significance with respect to either the value of the
     Company or any of its subsidiaries or the value of the Shares to the
     Purchaser or any affiliate of the Purchaser;
 
          (d)  there shall have occurred or been threatened (i) any general
     suspension of trading in, or limitation on prices for, securities on any
     national securities exchange or in the over-the-counter market in the
     United States, (ii) any extraordinary or material adverse change in the
     financial markets or major stock exchange indices in the United States or
     abroad or in the market price of Shares, (iii) any change in the general
     political, market, economic or financial conditions in the United States or
     abroad that could, in the sole judgment of the Purchaser, have a material
     adverse effect upon the business, properties, assets, liabilities,
     capitalization, stockholders' equity, condition (financial or otherwise),
     operations, licenses or franchises, results of operations or prospects of
     the Company or any of its subsidiaries or the trading in, or value of, the
     Shares, (iv) any material change in United States currency exchange rates
     or any other currency exchange rates or a suspension of, or limitation on,
     the markets therefor, (v) a declaration of a banking moratorium or any
     suspension of payments in respect of banks in the United States, (vi) any
     limitation (whether or not mandatory) by any government, domestic, foreign
     or supranational, or Governmental Entity on, or other event that, in the
     reasonable judgment of the Purchaser, might affect, the extension of credit
     by banks or other lending institutions, (vii) a commencement of a war or
     armed hostilities or other national or international calamity directly or
     indirectly involving the United States or (viii) in the case of any of the
     foregoing existing at the time of the commencement of the Offer, a material
     acceleration or worsening thereof; or
 
          (e)  any consent or approval required to be obtained from any Federal
     or state governmental agency, authority or instrumentality in connection
     with the Offer is not obtained, or the Purchaser is advised, or otherwise
     has reason to believe, that any such consent or approval will be denied or
     substantially delayed, or will not be given other than upon terms or
     conditions that would, in the Purchaser's reasonable judgment, make it
     impracticable to proceed with the Offer;
 
which, in the reasonable judgment of the Purchaser in any such case, and
regardless of the circumstances (including any action or inaction by the
Purchaser or any affiliate of the Purchaser) giving rise to any such condition
makes it inadvisable to proceed with the Offer and/or with such acceptance for
payment or payment.
 
     The foregoing conditions are for the sole benefit of the Purchaser and may
be asserted by the Purchaser regardless of the circumstances giving rise to any
such condition or may be waived by the Purchaser in whole or in part at any time
and from time to time in its sole discretion. The failure by the Purchaser at
any time to exercise any of the foregoing rights will not be deemed a waiver of
any such right, and the waiver of any such right with respect to particular
facts and circumstances will not be deemed a waiver with respect to any other
facts and circumstances and each such right will be deemed an ongoing right that
may be asserted at any time and from time to time. Any determination by the
Purchaser concerning the events described above will be final and binding upon
all parties.
 
CERTAIN LEGAL MATTERS
 
     The Offer constitutes a "Going Private" transaction under Rule 13e-3 under
the Exchange Act. Consequently, the Purchaser has filed with the Commission a
Transaction Statement on Schedule 13E-3, together with exhibits, in addition to
filing with the Commission a Tender Offer Statement on Schedule 14D-1. Pursuant
to Rule 13e-3, this Offer to Purchase contains information relating to, among
other matters, the fairness of the Offer to the Company's stockholders.
 
                                       34
<PAGE>   37
 
     Based on a review of publicly available filings made by the Company with
the Commission, other publicly available information concerning the Company, the
review of certain information furnished by the Company to the Purchaser and
discussions of representatives of the Purchaser with representatives of the
Company during the Purchaser's investigation of the Company, except as otherwise
described below, the Purchaser is not aware of any license or regulatory permit
that appears to be material to the business of the Company and its subsidiaries,
taken as a whole, that might be adversely affected by the Purchaser's
acquisition of Shares as contemplated herein or of any approval or other action
by any Governmental Entity that would be required for the acquisition or
ownership of Shares by the Purchaser as contemplated herein. Should any such
approval or other action be required, the Purchaser currently contemplates that
such approval or other action will be sought, except as described below under
"State Takeover Laws". While, except as otherwise expressly described in this
section, the Purchaser does not presently intend to delay the acceptance for
payment of or payment for Shares tendered pursuant to the Offer pending the
outcome of any such matter, there can be no assurance that any such approval or
other action, if needed, would be obtained or would be obtained without
substantial conditions or that failure to obtain any such approval or other
action might not result in consequences adverse to the Company's business or
that certain parts of the Company's business might not have to be disposed of if
such approvals were not obtained or such other actions were not taken or in
order to obtain any such approval or other action. If certain types of adverse
action are taken with respect to the matters discussed below, the Purchaser
could decline to accept for payment or pay for any Shares tendered. See
"-- Certain Conditions of the Offer" above for certain conditions of the Offer.
 
     State Takeover Laws.  A number of states throughout the United States have
enacted takeover statutes that purport, in varying degrees, to be applicable to
attempts to acquire securities of corporations that are incorporated or have
assets, stockholders, executive offices or places of business in such states. In
Edgar v. MITE Corp., the Supreme Court of the United States held that the
Illinois Business Takeover Act, which involved state securities laws that made
the takeover of certain corporations more difficult, imposed a substantial
burden on interstate commerce and therefore was unconstitutional. In CTS Corp.
v. Dynamics Corp. of America, however, the Supreme Court of the United States
held that a state may, as a matter of corporate law and, in particular, those
laws concerning corporate governance, constitutionally disqualify a potential
acquiror from voting on the affairs of a target corporation without prior
approval of the remaining stockholders, provided that such laws were applicable
only under certain conditions. Subsequently, a number of Federal courts ruled
that various state takeover statutes were unconstitutional insofar as they apply
to corporations incorporated outside the state of enactment.
 
     Except as described herein, the Purchaser has not attempted to comply with
any state takeover statutes in connection with the Offer. The Purchaser reserves
the right to challenge the validity or applicability of any state law allegedly
applicable to the Offer and nothing in this Offer to Purchase nor any action
taken in connection herewith is intended as a waiver of that right. In the event
that any state takeover statute is found applicable to the Offer, the Purchaser
might be unable to accept for payment or pay for Shares tendered pursuant to the
Offer or be delayed in continuing or consummating the Offer. In such case, the
Purchaser may not be obligated to accept for payment or pay for any Shares
tendered. See "-- Certain Conditions of the Offer" above.
 
     Ohio Statute.  Section 1707.041 of the Ohio Revised Code Annotated
(Anderson) ("Section 1707.041") provides, in general that in the event of a
control bid (as defined below) for the securities of a subject company (as
defined below), the offeror must file with The Ohio Division of Securities
certain information concerning the Offer, including a copy of this Offer to
Purchase. The Ohio Division of Securities may by order suspend the continuation
of the Offer if it determines that all of the information required to be
provided to it has not been so provided or that the bid materials provided to
offerees do not provide full disclosure to offerees of all material information
concerning the Offer.
 
                                       35
<PAGE>   38
 
     As used in Section 1707.041:
 
     "control bid" means the purchase of or offer to purchase any equity
security of a subject company from a resident of Ohio if either of the following
applies:
 
          (a) After the purchase of that security, the offeror would be directly
     or indirectly the beneficial owner of more than ten percent of any class of
     the issued and outstanding equity securities of the issuer.
 
          (b) The offeror is the subject company, there is a pending control bid
     by a person other than the issuer, and the number of the issued and
     outstanding shares of the subject company would be reduced by more than ten
     percent.
 
     "Subject company" means an issuer that satisfies both of the following:
 
          (a) Its principal place of business or its principal executive office
     is located in Ohio, or it owns or controls assets located within Ohio that
     have a fair market value of at least one million dollars.
 
          (b) More than ten per cent of its beneficial or record equity security
     holders are resident in Ohio, more than ten% of its equity securities are
     owned beneficially or of record by residents in Ohio, or more than one
     thousand of its beneficial or record equity security holders are residents
     in Ohio.
 
     In compliance with its obligations under Section 1707.041, the Purchaser
has filed Form 041 with the Ohio Division of Securities, together with certain
exhibits thereto. Offerees who are Ohio residents may obtain copies of Form 041,
together with all exhibits thereto, at no charge, from the State of Ohio,
Division of Securities, 77 South High Street, 22nd Floor, Columbus, Ohio
43266-0548, or alternatively, directly from Purchaser, Chemed Corporation 2600
Chemed Center, 255 East Fifth Street, Cincinnati, Ohio, 45202, Attention:
Secretary.
 
FEES AND EXPENSES
 
     The Purchaser has retained CS First Boston as its exclusive financial
advisor and as Dealer Manager in connection with the Offer. The Purchaser has
retained D.F. King & Co., Inc. to act as Information Agent and ChaseMellon
Shareholder Securities, L.L.C. to act as Depositary, in connection with the
Offer. The Information Agent may respond to inquiries of the Company's
stockholders and may request brokers, dealers, banks, trust companies and other
nominees to forward the Offer material to beneficial owners, but it will not
solicit tenders of Shares. The Dealer Manager, the Information Agent and the
Depositary will each receive reasonable and customary compensation for their
services, will be reimbursed for certain reasonable out-of-pocket expenses and
will be indemnified against certain liabilities and expenses in connection
therewith, including certain liabilities under the Federal securities laws. See
"Special Factors -- Opinion of Financial Advisor" for a description of the fees
and expenses that the Purchaser has agreed to pay CS First Boston to act as
financial advisor and as Dealer Manager in connection with the Offer.
 
     The Purchaser will not pay any fees or commissions to any broker or dealer
or other person (other than the Dealer Manager and the Information Agent) in
connection with the solicitation of tenders of Shares pursuant to the Offer.
Brokers, dealers, banks and trust companies will be reimbursed by the Purchaser
upon request for customary mailing and handling expenses incurred by them in
forwarding offering materials to their customers.
 
                                       36
<PAGE>   39
 
     Expenses estimated to be incurred by the Purchaser in connection with the
Offer are as follows:
 
<TABLE>
    <S>                                                                        <C>
    Financial Advisor Fees and Expenses....................................    $  950,000
    Depositary.............................................................    $   10,000
    Information Agent......................................................    $   15,000
    Legal fees.............................................................    $  500,000
    Printing, mailing and distribution expenses............................    $   50,000
    SEC filing fee.........................................................    $   17,732
    Miscellaneous fees and expenses........................................    $   18,000
              Total........................................................    $1,560,732
</TABLE>
 
MISCELLANEOUS
 
     The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares in any jurisdiction in which the making of the
Offer or the acceptance thereof would not be in compliance with the laws of such
jurisdiction. The Purchaser is not aware of any jurisdiction in which the making
of the Offer or the tender of Shares in connection therewith would not be in
compliance with the laws of such jurisdiction. To the extent the Purchaser
becomes aware of any state law that would limit the class of offerees in the
Offer, the Purchaser will amend the Offer and, depending on the timing of such
amendment, if any, will extend the Offer to provide adequate dissemination of
such information to holders of Shares prior to the expiration of the Offer. In
any jurisdiction the securities, blue sky or other laws of which require the
Offer to made by a licensed broker or dealer, the Offer is being made on behalf
of the Purchaser by the Dealer Manager or one or more registered brokers or
dealers licensed under the laws of such jurisdiction.
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION ON BEHALF OF THE PURCHASER NOT CONTAINED HEREIN OR IN THE LETTER
OF TRANSMITTAL AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST
NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED.
 
     The Purchaser has filed with the Commission a Tender Offer Statement on
Schedule 14D-1 and a Transaction Statement on Schedule 13E-3, together with
exhibits, pursuant to Rules 14d-1 and 13e-3, respectively, under the Exchange
Act, together with exhibits furnishing certain additional information with
respect to the Offer, and may file amendments thereto. A copy of such documents,
and any amendments thereto, may be examined at, and copies may be obtained from
the Commission (but not the regional offices of the Commission) in the manner
set forth under "-- Certain Information Concerning the Purchaser" above.
 
                                          Chemed Corporation
 
August 14, 1996
 
                                       37
<PAGE>   40
 
                                   SCHEDULE I
 
               DIRECTORS AND EXECUTIVE OFFICERS OF THE PURCHASER
 
     The following table sets forth the name, age and present principal
occupation or employment and five-year employment history of the directors and
executive officers of the Purchaser and the number of Shares and options to
acquire Shares beneficially owned, directly or indirectly, by such persons as of
the date hereof. All such directors and executive officers are United States
citizens and, except as set forth below, the principal business address of each
such director and executive officer is the address of the Purchaser, 2600 Chemed
Center, 255 E. Fifth Street, Cincinnati, OH 45202.
 
<TABLE>
<CAPTION>
                                                                        ROTO-ROOTER, INC.
                         PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT    SHARES AND OPTIONS
     NAME AND AGE             AND FIVE-YEAR EMPLOYMENT HISTORY         BENEFICIALLY OWNED
- -----------------------  -------------------------------------------  ---------------------
<S>                      <C>                                          <C>
EDWARD L. HUTTON         Mr. Hutton is Chairman and Chief Executive   45,536 Shares(1)(4)
Age: 77                  Officer of the Purchaser and has held these  50,750 options(2)
                         positions since November 1993. Previously,
                         from 1970 to November 1993, he served the
                         Purchaser as President and Chief Executive
                         Officer. Mr. Hutton is also Chairman of
                         Omnicare, Inc., Cincinnati, Ohio
                         (healthcare products and services), a
                         public corporation in which the Purchaser
                         holds a 2.8% ownership interest
                         (hereinafter "Omnicare"), Chairman of the
                         Company, and Chairman of National Sanitary
                         Supply Company, Cincinnati, Ohio (sanitary
                         and maintenance supplies distributor), an
                         84%-owned subsidiary of the Purchaser
                         (hereinafter "National"). Mr. Hutton is a
                         director of the Purchaser, National,
                         Omnicare and the Company. Mr. Hutton is the
                         father of Thomas C. Hutton, a Vice
                         President and a director of the Purchaser.
KEVIN J. MCNAMARA        Mr. McNamara is President of the Purchaser   2,096 Shares
Age: 43                  and has held this position since August      5,250 options(2)
                         1994. Previously, he served as Executive
                         Vice President, Secretary and General
                         Counsel from November 1993, August 1986 and
                         August 1986, respectively, to August 1994.
                         From May 1992 to November 1993, he was a
                         Vice Chairman of the Purchaser and from
                         August 1986 to May 1992 he was a Vice
                         President of the Purchaser. He is also Vice
                         Chairman of the Company and National. He is
                         a director of the Purchaser, National,
                         Omnicare and the Company.
</TABLE>
 
                                       38
<PAGE>   41
 
<TABLE>
<CAPTION>
                                                                        ROTO-ROOTER, INC.
                         PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT    SHARES AND OPTIONS
     NAME AND AGE             AND FIVE-YEAR EMPLOYMENT HISTORY         BENEFICIALLY OWNED
- -----------------------  -------------------------------------------  ---------------------
<S>                      <C>                                          <C>
JAMES A. CUNNINGHAM      Mr. Cunningham is a Senior Chemical Adviser  1,000 Shares
Age: 51                  with Schroder Wertheim & Co. Incorporated,   No options
                         New York, New York (an investment banking,
                         asset management and securities firm), and
                         has held this position since March 1992.
                         Previously, he was a Managing Director of
                         Furman Selz Incorporated, New York, New
                         York (an institutional investment company),
                         and held this position from October 1990 to
                         March 1992. Mr. Cunningham is a director of
                         the Purchaser, National and the Company.
JAMES H. DEVLIN          Mr. Devlin is a Vice President of the        No Shares
Age: 49                  Purchaser and Group Executive of the         No options
The Omnia Group          Purchaser's Omnia Group (formerly known as
50 Big Beaver Road       the "Veratex Group") and has held these
Suite 350                positions since December 1992. Previously,
Troy, MI 48084           Mr. Devlin was an Executive Vice President
                         of Omnicare from May 1989 to December 1992
                         and held the same position with the Veratex
                         Group since May 1987 when it was owned and
                         operated by Omnicare. Mr. Devlin is a
                         director of the Purchaser.
CHARLES H. ERHART, JR.   Mr. Erhart retired as President of W.R.      6,666 Shares
Age: 71                  Grace and Co. (hereinafter "Grace"), Boca    No options
                         Raton, Florida (international specialty
                         chemicals and healthcare) in August 1990,
                         having held that position since July 1989.
                         Previously, he was Chairman of the
                         Executive Committee of Grace and held that
                         position from November 1986 to July 1989.
                         He is a director of the Purchaser,
                         National, Omnicare and the Company.
JOEL F. GEMUNDER         Mr. Gemunder is President of Omnicare and    1,100 Shares
Age: 57                  has held this position since May 1981. He    No options
Omnicare, Inc.           is a director of the Purchaser and
2800 Chemed Center       Omnicare.
Cincinnati, Ohio
PATRICK P. GRACE         Mr. Grace is a consultant and investment     No Shares
Age: 40                  adviser. Previously, from February 1991 to   No options
                         October 1995, he was President of Grace
                         Logistics Services, Inc., Greenville, South
                         Carolina (a full service provider of
                         logistical support), a subsidiary of Grace.
                         From March 1988 to February 1991, he served
                         as Chief Financial Officer at Kascho GmbH,
                         Berlin, Germany (manufacturer of chocolate
                         products), a subsidiary of Grace. Mr. Grace
                         is a director of the Purchaser.
</TABLE>
 
                                       39
<PAGE>   42
 
<TABLE>
<CAPTION>
                                                                        ROTO-ROOTER, INC.
                         PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT    SHARES AND OPTIONS
     NAME AND AGE             AND FIVE-YEAR EMPLOYMENT HISTORY         BENEFICIALLY OWNED
- -----------------------  -------------------------------------------  ---------------------
<S>                      <C>                                          <C>
WILLIAM R. GRIFFIN       Mr. Griffin is President and Chief           26,760 Shares(3)
Age: 52                  Executive Officer and a director of the      61,500 options(2)
Roto-Rooter, Inc.        Company and has held these positions since
2500 Chemed Center       May 1985. Mr. Griffin is also an Executive
Cincinnati, OH 45202     Vice President of the Purchaser and has
                         held this position since May 1991. Mr.
                         Griffin is a director of the Purchaser,
                         Barefoot Inc., and Globe Business
                         Resources.
THOMAS C. HUTTON         Mr. Hutton is a Vice President of the        12,416 Shares(4)
Age: 45                  Purchaser and has held this position since   4,500 options(2)
Chemed Corporation       February 1988. Mr. Hutton is a director of
Suite 1510               the Purchaser, National, Omnicare and the
One Rockefeller Plaza    Company. He is a son of Edward L. Hutton,
New York, NY 10020       the Chairman and Chief Executive Officer
                         and a director of the Purchaser.
WALTER L. KREBS          Mr. Krebs retired as Director-Financial      No Shares
Age: 63                  Services of Diversey Corporation, Detroit,   No options
                         Michigan (specialty chemicals) ("Diversey")
                         on April 30, 1996. Mr. Krebs had held that
                         position since April 1991. Previously, from
                         January 1990 to April 1991, he was a Senior
                         Vice President and the Chief Financial
                         Officer of the Purchaser's then wholly
                         owned subsidiary, DuBois Chemicals, Inc.
                         ("DuBois"). Mr. Krebs is a director of the
                         Purchaser.
SANDRA E. LANEY          Ms. Laney is Senior Vice President and the   2,859 Shares
Age: 52                  Chief Administrative Officer of the          4,250 options (2)
                         Purchaser and has held these positions
                         since November 1993 and May 1991,
                         respectively. Previously, from May 1984 to
                         November 1993, she was a Vice President of
                         the Purchaser. Ms. Laney is a director of
                         the Purchaser, National, Omnicare and the
                         Company.
JOHN M. MOUNT            Mr. Mount is a Principal of Lynch-Mount      1,075 Shares
Age: 54                  Associates, Cincinnati, Ohio (management     No options
6685 Miralake Drive      consulting), and has held this position
Cincinnati, OH 45243     since November 1993. From April 1991 to
                         November 1993, Mr. Mount was Senior Vice
                         President of Diversey and President of
                         Diversey's DuBois Industrial division.
                         Previously, from May 1989 to April 1991,
                         Mr. Mount was an Executive Vice President
                         of the Purchaser and President of DuBois.
                         He held the latter position from September
                         1986 to April 1991. He is a director of the
                         Purchaser, National, Omnicare and the
                         Company.
</TABLE>
 
                                       40
<PAGE>   43
 
<TABLE>
<CAPTION>
                                                                        ROTO-ROOTER, INC.
                         PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT    SHARES AND OPTIONS
     NAME AND AGE             AND FIVE-YEAR EMPLOYMENT HISTORY         BENEFICIALLY OWNED
- -----------------------  -------------------------------------------  ---------------------
<S>                      <C>                                          <C>
TIMOTHY S. O'TOOLE       Mr. O'Toole is an Executive Vice President   2,151 Shares
Age: 40                  and the Treasurer of the Purchaser and has   6,000 options (2)
                         held these positions since May 1992. He is
                         also the Chairman and Chief Executive
                         Officer of Patient Care, Inc., a 100%-owned
                         subsidiary of the Purchaser. From February
                         1989 to May 1992, he was a Vice President
                         and Treasurer of the Purchaser. He is a
                         director of the Purchaser, Vitas Healthcare
                         Corporation, National, Omnicare and the
                         Company.
D. WALTER ROBBINS, JR.   Mr. Robbins retired as Vice Chairman of      1,000 Shares
Age: 76                  Grace in January 1987 and thereafter became  No options
                         a consultant to Grace until July 1995. He
                         is a director of the Purchaser, National,
                         Omnicare and the Company.
PAUL C. VOET             Mr. Voet is an Executive Vice President of   2,024 Shares
Age: 50                  the Purchaser and has held this position     No options
                         since May 1991. Previously, from May 1988
                         to November 1993, he also served the
                         Purchaser as a Vice Chairman. Mr. Voet is
                         President and Chief Executive Officer and a
                         director of National. Mr. Voet is a
                         director of the Purchaser.
GEORGE J. WALSH III      Mr. Walsh is a partner with the law firm of  75 Shares
Age: 51                  Gould & Wilkie, New York, New York, and has  No options
Gould & Wilkie           held this position since January 1978. He
One Chase Manhattan      is a director of the Purchaser, National
  Plaza                  and the Company.
New York, NY 10005
ARTHUR V. TUCKER, JR.    Mr. Tucker is a Vice President and           No Shares
Age: 47                  Controller of the Purchaser and has held     No options
                         these positions since February 1989.
</TABLE>
 
- ---------------
(1) Included in the 45,536 Shares, Mr. E.L. Hutton owns restricted stock awards
    that were granted under stock incentive plans of the Company, for (a) 1,333
    Shares, all of which are unvested and which will vest on February 8, 1997,
    (b) 3,232 Shares, all of which are unvested and which will vest in equal
    amounts on each of February 1, 1997, 1998, 1999 and 2000 and (c) 3,650
    Shares, all of which are unvested and which will vest in equal amounts on
    each of February 7, 1997, 1998 and 1999.
 
(2) Each of the options listed above was granted pursuant to one of the
    Company's stock incentive plans. All of such options are subject to
    restrictions on transfer.
 
(3) Included in the 23,933 Shares, Mr. Griffin owns restricted stock awards that
    were granted under stock incentive plans of the Company, for (a) 1,333
    Shares, all of which are unvested and which will vest on February 8, 1997,
    (b) 3,232 Shares, all of which are unvested and which will vest in equal
    amounts on each of February 1, 1997, 1998, 1999 and 2000 and (c) 3,650
    Shares, all of which are unvested and which will vest in equal amounts on
    each of February 7, 1997, 1998 and 1999.
 
(4) 7,372 of these Shares are owned by the Edward L. Hutton Foundation, over
    which Mr. E.L. Hutton and Mr. T.C. Hutton hold beneficial ownership.
 
                                       41
<PAGE>   44
 
                                                                      APPENDIX A
 
                  [LETTERHEAD OF CS FIRST BOSTON CORPORATION]
 
August 8, 1996
 
Board of Directors
Chemed Corporation
2600 Chemed Center
255 East Fifth Street
Cincinnati, Ohio 45202-4726
 
Members of the Board:
 
     You have asked us to advise you with respect to the fairness from a
financial point of view to the stockholders of Roto-Rooter, Inc. (the "Company")
other than Chemed Corporation (the "Acquiror") of the cash consideration to be
received by such stockholders pursuant to the tender offer to be made by the
Acquiror (the "Tender Offer"). Pursuant to the Tender Offer, the Acquiror will
offer to purchase any and all shares of common stock, par value $1.00 per share
(the "Shares"), of the Company (other than Shares currently held by the
Acquiror) for $41.00 per share in cash.
 
     In arriving at our opinion, we have reviewed certain publicly available
business and financial information relating to the Company, as well as a draft
dated August 6, 1996 of the offer to purchase to be distributed to the
stockholders of the Company in connection with the Tender Offer. We have also
reviewed certain other information, including financial forecasts, provided to
us by the Company and the Acquiror and have met with the management of the
Acquiror to discuss the business and prospects of the Company.
 
     We have also considered certain financial and stock market data of the
Company, and we have compared that data with similar data for other publicly
held companies in businesses similar to those of the Company and we have
considered the financial terms of certain other acquisitions and business
combinations that have recently been effected. We have also considered such
other information, financial studies, analyses and investigations and financial,
economic and market criteria that we deemed relevant.
 
     In connection with our review, we have not assumed any responsibility for
independent verification of any of the foregoing information and have relied on
its being complete and accurate in all material respects. With respect to the
financial forecasts, we have assumed that, at the time they were prepared, they
were reasonably prepared on bases reflecting the best available estimates and
judgments at the time of the Company's management as to the future financial
performance of the Company and, as currently updated and adjusted, reflect the
best currently available estimates and judgments of the Acquiror's management as
to the future financial performance of the Company. In addition, we have not
made an independent evaluation or appraisal of the assets or liabilities
(contingent or otherwise) of the Company, nor have we been furnished with any
such evaluations or appraisals. Our opinion is necessarily based upon financial,
economic, market and other conditions as they exist and can be evaluated on the
date hereof. We were not requested to, and did not, solicit third party
indications of interest in acquiring all or any part of the Company.
 
     We have acted as financial advisor to the Acquiror in connection with the
Tender Offer and will receive a fee for our services.
 
     We have in the past performed, and are currently performing, certain
investment banking services for the Acquiror and its affiliated companies other
than the Company, and have received customary fees for such services.
<PAGE>   45
 
     In the ordinary course of our business, CS First Boston and its affiliates
may actively trade the debt and equity securities of both the Company and the
Acquiror for their own accounts and for the accounts of customers and,
accordingly, may at any time hold a long or short position in such securities.
 
     It is understood that this letter is for the information of the Board of
Directors of the Acquiror in connection with the Tender Offer and does not
constitute a recommendation to any stockholder of the Company as to whether such
stockholder should tender Shares pursuant to the Tender Offer.
 
     Based upon and subject to the foregoing, it is our opinion that, as of the
date hereof, the cash consideration to be received by the stockholders of the
Company pursuant to the Tender Offer is fair to such stockholders other than the
Acquiror from a financial point of view.
 
Very truly yours,
 
CS FIRST BOSTON CORPORATION
<PAGE>   46
 
                        The Depositary for the Offer is:
 
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
 
<TABLE>
<S>                            <C>                            <C>
    By Overnight Delivery:                By Mail:                       By Hand:
    ChaseMellon Shareholder        ChaseMellon Shareholder        ChaseMellon Shareholder
       Services, L.L.C.               Services, L.L.C.               Services, L.L.C.
      85 Challenger Road                P.O. Box 396             120 Broadway, 13th Floor
   Ridgefield Park, NJ 07660        Bowling Green Station              New York, NY
Attn: Reorganization Department       New York, NY 10274
</TABLE>
 
                             For Information, Call:
                                 (800) 777-3674
 
Questions and requests for assistance or for additional copies of this Offer to
Purchase, the Letter of Transmittal and the Notice of Guaranteed Delivery may be
directed to the Information Agent or the Dealer Manager at their respective
telephone numbers and locations listed below. You may also contact your broker,
dealer, commercial bank, trust company or other nominee for assistance
concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
 
                                77 Water Street
                               New York, NY 10005
                         Call Toll Free: (800) 848-3374
 
                      The Dealer Manager for the Offer is:
 
                                CS FIRST BOSTON

                               Park Avenue Plaza
                              55 East 52nd Street
                               New York, NY 10055
                         Call Toll Free: (800) 881-8320

<PAGE>   1
 
                             LETTER OF TRANSMITTAL
 
                        TO TENDER SHARES OF COMMON STOCK
 
                                       OF
 
                               ROTO-ROOTER, INC.
 
            PURSUANT TO THE OFFER TO PURCHASE DATED AUGUST 14, 1996
 
                                       BY
 
                               CHEMED CORPORATION
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
     TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS EXTENDED.
 
                        The Depositary for the Offer is:
                    ChaseMellon Shareholder Services, L.L.C.
 
<TABLE>
<S>                               <C>                               <C>
      By Overnight Delivery:                   By Mail:                          By Hand:
ChaseMellon Shareholder Services, ChaseMellon Shareholder Services, ChaseMellon Shareholder Services,
              L.L.C.                            L.L.C.                            L.L.C.
        85 Challenger Road                   P.O. Box 396                120 Broadway, 13th Floor
    Ridgefield Park, NJ 07660           Bowling Green Station                  New York, NY
 Attn: Reorganization Department          New York, NY 10274
</TABLE>
 
                             For Information, Call:
                                 1-800-777-3674
 
DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION OTHER THAN
     AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU MUST
            SIGN THIS LETTER OF TRANSMITTAL WHERE INDICATED BELOW
            AND COMPLETE THE SUBSTITUTE FORM W-9 PROVIDED BELOW.
 
    THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
           CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
     This Letter of Transmittal is to be completed by stockholders of
Roto-Rooter, Inc. (the "Company") either if certificates ("Share Certificates")
evidencing Shares (as defined below) are to be forwarded herewith or if delivery
of Shares is to be made by book-entry transfer to the account of ChaseMellon
Shareholder Services, L.L.C. (the "Depositary") at The Depository Trust Company,
Midwest Securities Trust Company or Philadelphia Depository Trust Company (each,
a "Book-Entry Transfer Facility" and collectively, the "Book-Entry Transfer
Facilities") pursuant to the book-entry transfer procedures described in the
section entitled "The Tender Offer -- Procedure for Tendering Shares" of the
Offer to Purchase (as defined below). Delivery of documents to a Book-Entry
Transfer Facility in accordance with such Book-Entry Transfer Facility's
procedures does not constitute delivery to the Depositary.
 
     Stockholders whose Share Certificates are not immediately available or who
cannot deliver their Share Certificates and all other documents required hereby
to the Depositary prior to the Expiration Date (as defined in the Offer to
Purchase) or who cannot complete the procedure for delivery by book-entry
transfer on a timely basis and who wish to tender their Shares must do so
pursuant to the guaranteed delivery procedure described in the section entitled
"The Tender Offer -- Procedure for Tendering Shares" of the Offer to Purchase.
See Instruction 2.
<PAGE>   2
 
/ / CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE
    DEPOSITARY'S ACCOUNT AT ONE OF THE BOOK-ENTRY TRANSFER FACILITIES AND
    COMPLETE THE FOLLOWING:
 
   Name of Tendering Institution: ________________________________________
 
   Check box of Applicable Book-Entry Transfer Facility:
 
        / / The Depository Trust Company
 
        / / Midwest Securities Trust Company
 
        / / Philadelphia Depository Trust Company
 
   Account Number ________________________________________________________
 
   Transaction Code Number _______________________________________________
 
/ / CHECK HERE IF SHARES ARE BEING TENDERED PURSUANT TO A NOTICE OF GUARANTEED
    DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING:
 
   Name(s) of Registered Holder(s): ______________________________________
 
   Date of Execution of Notice of Guaranteed Delivery: ___________________
 
   Name of Institution which Guaranteed Delivery: ________________________
 
    If Delivered by Book-Entry Transfer, Check Box of Applicable Book-Entry
    Transfer Facility:
 
        / / The Depository Trust Company
 
        / / Midwest Securities Trust Company
 
        / / Philadelphia Depository Trust Company
 
   Account Number ________________________________________________________
 
   Transaction Code Number _______________________________________________
 
- --------------------------------------------------------------------------------
                         DESCRIPTION OF SHARES TENDERED
 
<TABLE>
<S>                                                            <C>                  
- ------------------------------------------------------------------------------------------------------------------------------
        NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
         (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)                     SHARE CERTIFICATE(S) AND SHARE(S) TENDERED
              APPEAR(S) ON SHARE CERTIFICATE(S))                             (ATTACH ADDITIONAL LIST IF NECESSARY)
 ------------------------------------------------------------------------------------------------------------------------------
                                                                                          TOTAL NUMBER
                                                                       SHARE               OF SHARES             NUMBER OF
                                                                    CERTIFICATE        EVIDENCED BY SHARE          SHARES
                                                                    NUMBER(S)(1)       CERTIFICATE(S)(1)        TENDERED(2)
                                                                ---------------------------------------------------------------
                                                                ---------------------------------------------------------------
                                                                ---------------------------------------------------------------
                                                                ---------------------------------------------------------------
                                                                                  TOTAL SHARES OF COMMON STOCK
 ------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
 (1) Need not be completed by stockholders delivering Shares by book-entry
     transfer.
 
 (2) Unless otherwise indicated, it will be assumed that all Shares evidenced
     by each Share Certificate are being tendered. See Instruction 4.
- --------------------------------------------------------------------------------
<PAGE>   3
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW.
                 PLEASE READ THE INSTRUCTIONS SET FORTH IN THIS
                        LETTER OF TRANSMITTAL CAREFULLY
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Chemed Corporation, a Delaware
corporation (the "Purchaser"), the above-described shares of Common Stock, par
value $1.00 per share (the "Shares"), of Roto-Rooter, Inc., a Delaware
corporation (the "Company"), pursuant to Purchaser's offer to purchase any and
all outstanding Shares at a price of $41.00 per Share, net to the seller in
cash, upon the terms and subject to the conditions set forth in the Offer to
Purchase dated August 14, 1996 (the "Offer to Purchase"), receipt of which is
hereby acknowledged, and in this Letter of Transmittal (which, as amended from
time to time, together constitute the "Offer"). The undersigned understands that
the Purchaser reserves the right to transfer or assign, in whole or at any time
in part from time to time, to one or more of its affiliates, the right to
purchase all or any portion of the Shares tendered pursuant to the Offer, but
any such transfer or assignment will not relieve the Purchaser of its
obligations under the Offer and will in no way prejudice the rights of tendering
stockholders to receive payment for Shares validly tendered and accepted for
payment pursuant to the Offer.
 
     Subject to, and effective upon, acceptance for payment of, the Shares
tendered herewith, in accordance with the terms of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), the undersigned hereby sells, assigns and transfers to, or upon the
order of, the Purchaser all right, title and interest in and to all the Shares
that are being tendered hereby (and any and all other Shares or other securities
or rights issued or issuable in respect of such Shares on or after August 8,
1996 (collectively, "Distributions")), and irrevocably appoints the Depositary
the true and lawful agent and attorney-in-fact of the undersigned with respect
to such Shares and all Distributions, with full power of substitution (such
power of attorney being deemed to be an irrevocable power coupled with an
interest), to (a) deliver Share Certificates evidencing such Shares and all
Distributions, or transfer ownership of such Shares and all Distributions on the
account books maintained by a Book-Entry Transfer Facility together, in either
case, with all accompanying evidence of transfer and authenticity, to or upon
the order of the Purchaser, (b) present such Shares and all Distributions for
transfer on the Company's books and (c) receive all benefits and otherwise
exercise all rights of beneficial ownership of such Shares and all
Distributions, all in accordance with the terms of the Offer.
 
     By executing this Letter of Transmittal, the undersigned irrevocably
appoints Kevin J. McNamara, Timothy S. O'Toole and Thomas C. Hutton, as
attorneys-in-fact and proxies of the undersigned, each with full power of
substitution, to the full extent of the undersigned's rights with respect to the
Shares tendered by the undersigned and accepted for payment by the Purchaser
(and any and all Distributions). All such attorneys-in-fact and proxies shall be
considered coupled with an interest in the tendered Shares. This appointment
will be effective if, when, and only to the extent that, the Purchaser accepts
such Shares for payment pursuant to the Offer. Upon such acceptance for payment,
all prior powers of attorney and proxies given by the undersigned with respect
to such Shares and other securities will, without further action, be revoked,
and no subsequent proxies may be given. The individuals named above as
attorneys-in-fact and proxies will, with respect to the Shares and other
securities for which the appointment is effective, be empowered to exercise all
voting and other rights of the undersigned as they in their sole discretion may
deem proper at any annual, special, adjourned or postponed meeting of the
Company's stockholders, by written consent or otherwise, and the Purchaser
reserves the right to require that in order for Shares or other securities to be
deemed validly tendered, immediately upon the Purchaser's acceptance for payment
of such Shares, the Purchaser must be able to exercise full voting rights with
respect to such Shares.
 
     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and all Distributions and that when the same are accepted for
payment by the Purchaser, the Purchaser will acquire good, marketable and
unencumbered title thereto and to all Distributions, free and clear of all
liens, restrictions, charges and encumbrances, and that none of such Shares and
Distributions will be subject to any adverse claim. The undersigned, upon
request, shall execute and deliver all additional documents deemed by the
Depositary or the Purchaser to be necessary or desirable to complete the sale,
assignment and transfer of the Shares tendered hereby and all Distributions. In
addition, the undersigned shall remit and transfer promptly to the Depositary
for the account of the Purchaser all Distributions in respect of the Shares
tendered hereby, accompanied by appropriate documentation of transfer, and,
pending such remittance and transfer or appropriate assurance thereof, the
Purchaser shall be entitled to all rights and privileges as owner of each such
Distribution and may withhold the entire purchase price of the Shares tendered
hereby or deduct from such purchase price, the amount or value of such
Distribution as determined by the Purchaser in its sole discretion.
 
     No authority herein conferred or agreed to be conferred shall be affected
by, and all such authority shall survive, the death or incapacity of the
undersigned. All obligations of the undersigned hereunder shall be binding upon
the heirs, personal representatives, successors and assigns of the undersigned.
Except as stated in the Offer to Purchase, this tender is irrevocable.
<PAGE>   4
 
     The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in the section entitled "The Tender Offer -- Procedure
for Tendering Shares" of the Offer to Purchase and in the instructions hereto
will constitute the undersigned's acceptance of the terms and conditions of the
Offer. The Purchaser's acceptance for payment of Shares tendered pursuant to the
Offer will constitute a binding agreement between the undersigned and the
Purchaser upon the terms and subject to the conditions of the Offer. The
undersigned recognizes that under certain circumstances set forth in the Offer
to Purchase, the Purchaser may not be required to accept for payment any of the
Shares tendered hereby.
 
     Unless otherwise indicated herein in the box entitled "Special Payment
Instructions", please issue the check for the purchase price of all Shares
purchased, and return all Share Certificates evidencing Shares not purchased or
not tendered, in the name(s) of the registered holder(s) appearing above under
"Description of Shares Tendered". Similarly, unless otherwise indicated in the
box entitled "Special Delivery Instructions", please mail the check for the
purchase price of all Shares purchased and all Share Certificates evidencing
Shares not tendered or not purchased (and accompanying documents, as
appropriate) to the address(es) of the registered holder(s) appearing above
under "Description of Shares Tendered". In the event that the boxes entitled
"Special Payment Instructions" and "Special Delivery Instructions" are both
completed, please issue the check for the purchase price of all Shares purchased
and return all Share Certificates evidencing Shares not purchased or not
tendered in the name(s) of, and mail such check and Share Certificates to the
person(s) so indicated. Unless otherwise indicated herein in the box entitled
"Special Payment Instructions", please credit any Shares tendered hereby and
delivery by book-entry transfer, but which are not purchased, by crediting the
account at the Book-Entry Transfer Facility designated above. The undersigned
recognizes that the Purchaser has no obligation, pursuant to the Special Payment
Instructions, to transfer any Shares from the name of the registered holder(s)
thereof if the Purchaser does not accept for payment any of the Shares tendered
hereby.
<PAGE>   5
 
/ / CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN HAVE
    BEEN LOST OR DESTROYED AND SEE INSTRUCTION 10.
 
   Number of Shares represented by the lost or destroyed certificates: ________
 
          ------------------------------------------------------------
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if the check for the purchase price of the
   Shares purchased or Share Certificates evidencing the Shares not tendered
   or not purchased are to be issued in the name of someone other than the
   undersigned, or if the Shares tendered hereby and delivered by book-entry
   transfer which are not purchased are to be returned by credit to an
   account at one of the Book-Entry Transfer Facilities other than that
   designated above.
 
   Issue:  / / Check     / / Share Certificate(s) to:
 
   Name
   -------------------------------------------------------------------
                                    (PLEASE PRINT)
 
   Address
   -------------------------------------------------------------------
 
          ------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
          ------------------------------------------------------------
              (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
   / / Credit Shares delivered by book-entry transfer and not purchased to
       the account set forth below:
 
   Check appropriate box:
   / / The Depository Trust Company
   / / Midwest Securities Trust Company
   / / Philadelphia Depository Trust Company
 
   Account Number
                  ----------------------------------------------------
          ------------------------------------------------------------
 
                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if the check for the purchase price of the
   Shares purchased or Share Certificates evidencing the Shares not tendered
   or not purchased are to be mailed to someone other than the undersigned,
   or to the undersigned at an address other than that shown under
   "Description of Shares Tendered".
 
   Mail:  / / Check     / / Share Certificate(s) to:
 
   Name
   -------------------------------------------------------------------
                                    (PLEASE PRINT)
 
   Address
   -------------------------------------------------------------------
 
          ------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
          ------------------------------------------------------------
              (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
          ------------------------------------------------------------
<PAGE>   6
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. Guarantee of Signatures.  No signature guarantee is required on this
Letter of Transmittal if (a) this Letter of Transmittal is signed by the
registered holder(s) (which term, for purposes of this document, includes any
participant in any of the Book-Entry Transfer Facilities' systems whose name
appears on a security position listing as the owner of Shares) of any of the
Shares tendered herewith and such registered holder(s) has not completed either
the box entitled "Special Payment Instructions" or the box entitled "Special
Delivery Instructions" above or (b) such Shares are tendered for the account of
a financial institution (including most commercial banks, savings and loan
associations and brokerage houses) that is a participant in the Security
Transfer Agents Medallion Program, the New York Stock Exchange Medallion
Signature Guarantee Program or the Stock Exchange Medallion Program (an
"Eligible Institution"). In all other cases, all signatures on this Letter of
Transmittal must be guaranteed by an Eligible Institution. See Instruction 5. If
Share Certificates are registered in the name of a person other than the signer
of this Letter of Transmittal, or if payment is to be made or Share Certificates
not accepted for payment are to be returned to a person other than the
registered holder of the Share Certificates surrendered, the tendered Share
Certificate must be endorsed or accompanied by appropriate stock powers, in
either case signed exactly as the name or name(s) of the registered holders or
owners appear on the Share Certificate, with the signatures on such Share
Certificate or stock powers guaranteed as aforesaid. See Instruction 5.
 
     2. Delivery of Letter of Transmittal and Share Certificates.  This Letter
of Transmittal is to be used either if Share Certificates are to be forwarded
herewith or if Shares are to be delivered by book-entry transfer pursuant to the
procedure set forth in the section entitled "The Tender Offer -- Procedure for
Tendering Shares" of the Offer to Purchase. Share Certificates evidencing all
tendered Shares, or confirmation of a book-entry transfer of such Shares (a
"Book Entry Confirmation"), if such procedure is available, into the
Depositary's account at one of the Book-Entry Transfer Facilities pursuant to
the procedures set forth in the section entitled "The Tender Offer -- Procedure
for Tendering Shares" of the Offer to Purchase, together with a properly
completed and duly executed Letter of Transmittal (or facsimile thereof) with
any required signature guarantees (or, in the case of a book-entry transfer, an
Agent's Message, as defined below) and any other documents required by this
Letter of Transmittal, must be received by the Depositary at one of its
addresses set forth on the back cover hereof prior to the Expiration Date. If
Share Certificates are forwarded to the Depositary in multiple deliveries, a
properly completed and duly executed Letter of Transmittal must accompany each
such delivery. Stockholders whose Share Certificates are not immediately
available, who cannot deliver their Share Certificates and all other required
documents to the Depositary prior to the Expiration Date or who cannot complete
the procedure for delivery by book-entry transfer on a timely basis may tender
their Shares pursuant to the guaranteed delivery procedure described in the
section entitled "The Tender Offer -- Procedure for Tendering Shares" of the
Offer to Purchase. Pursuant to such procedure: (i) such tender must be made by
or through an Eligible Institution; (ii) a properly completed and duly executed
Notice of Guaranteed Delivery, substantially in the form provided by the
Purchaser herewith, must be received by the Depositary prior to the Expiration
Date; and (iii) in the case of a guarantee of Shares, the Share Certificates, in
proper form for transfer, or a confirmation of a book-entry transfer of such
Shares, if such procedure is available, into the Depositary's account at one of
the Book-Entry Transfer Facilities, together with a properly completed and duly
executed Letter of Transmittal (or facsimile thereof) with any required
signature guarantees (or, in the case of a book-entry transfer, an Agent's
Message), and any other documents required by this Letter of Transmittal, must
be received by the Depositary within three trading days after the date of
execution of the Notice of Guaranteed Delivery, all as described in the section
entitled "The Tender Offer -- Procedure for Tendering Shares" of the Offer to
Purchase. A "trading day" is any day on which the Nasdaq National Market is open
for business. The term "Agent's Message" means a message, transmitted by a
Book-Entry Transfer Facility to, and received by, the Depositary and forming a
part of a Book-Entry Confirmation, which states that such Book-Entry Transfer
Facility has received an express acknowledgment from the participant in such
Book-Entry Facility tendering the Shares that such participant has received and
agrees to be bound by the terms of this Letter of Transmittal and that the
Purchaser may enforce such agreement against the participant.
<PAGE>   7
 
     THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, SHARE CERTIFICATES
AND ALL OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY
TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE TENDERING STOCKHOLDER, AND
THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY.
IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO
ENSURE TIMELY DELIVERY.
 
     No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. By execution of this Letter of Transmittal
(or a facsimile hereof), all tendering stockholders waive any right to receive
any notice of the acceptance of their Shares for payment.
 
     3. Inadequate Space.  If the space provided herein under "Description of
Shares Tendered" is inadequate, the Share Certificate numbers, the number of
Shares evidenced by such Share Certificates and the number of Shares tendered
should be listed on a separate schedule and attached hereto.
 
     4. Partial Tenders.  (Not applicable to stockholders who tender by
book-entry transfer.) If fewer than all the Shares evidenced by any Share
Certificate delivered to the Depositary herewith are to be tendered hereby, fill
in the number of Shares which are to be tendered in the box entitled "Number of
Shares Tendered". In such cases, new Share Certificate(s) evidencing the
remainder of the Shares that were evidenced by the Share Certificates delivered
to the Depositary herewith will be sent to the person(s) signing this Letter of
Transmittal, unless otherwise provided in the box entitled "Special Delivery
Instructions", as soon as practicable after the expiration or termination of the
Offer. All Shares evidenced by Share Certificates delivered to the Depositary
will be deemed to have been tendered unless otherwise indicated.
 
     5. Signatures on Letter of Transmittal, Stock Powers and Endorsements.  If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond with the name(s) as written on
the face of the certificate(s) without any alteration, enlargement or change
whatsoever.
 
     If any Share tendered hereby is owned of record by two or more persons, all
such persons must sign this Letter of Transmittal.
 
     If any of the Shares tendered hereby are registered in the names of
different holders, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of such
Shares.
 
     If this Letter of Transmittal is signed by the registered holder(s) of the
Shares tendered hereby, no endorsements of Share Certificates or separate stock
powers are required, unless payment is to be made to, or Share Certificates
evidencing Shares not tendered or not purchased are to be issued in the name of
a person other than the registered holder(s), in which case the Share
Certificate(s) evidencing the Shares tendered hereby must be endorsed or
accompanied by appropriate stock powers, in either case signed exactly as the
name(s) of the registered holder(s) appears(s) on such Share Certificate(s).
Signatures on such Share Certificate(s) and stock powers must be guaranteed by
an Eligible Institution.
 
     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares tendered hereby, the Share Certificate(s)
evidencing the Shares tendered hereby must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name(s) of the
registered holder(s) appear(s) on such Share Certificate(s). Signatures on such
Share Certificate(s) and stock powers must be guaranteed by an Eligible
Institution.
 
     If this Letter of Transmittal or any Share Certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Purchaser of such person's authority so to act must be
submitted.
<PAGE>   8
 
     6. Stock Transfer Taxes.  Except as provided in this Instruction 6, the
Purchaser will pay all stock transfer taxes with respect to the transfer and
sale of Shares to it or its order pursuant to the Offer. If, however, payment of
the purchase price of any Shares purchased is to be made to, or if Share
Certificates evidencing Shares not tendered or not purchased are to be issued in
the name of, a person other than the registered holder(s), the amount of any
stock transfer taxes (whether imposed on the registered owner(s), such other
person or otherwise) payable on account of the transfer to such other person
will be deducted from the purchase price of such Shares purchased, unless
satisfactory evidence to the Purchaser of the payment of such taxes or exemption
therefrom, is submitted.
 
     EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE SHARE CERTIFICATES EVIDENCING THE
SHARES TENDERED HEREBY.
 
     7. Special Payment and Delivery Instructions. If a check for the purchase
price of any Shares tendered hereby is to be issued, or Share Certificate(s)
evidencing Shares not tendered or not purchased are to be issued, in the name of
a person other than the person(s) signing this Letter of Transmittal or if such
check or any such Share Certificate is to be sent to someone other than the
person(s) signing this Letter of Transmittal or to the person(s) signing this
Letter of Transmittal but at an address other than that shown in the box
entitled "Description of Shares Tendered", the appropriate boxes on this Letter
of Transmittal must be completed. Stockholders delivering Shares tendered hereby
by book-entry transfer may request that Shares not purchased be credited to such
account maintained at a Book-Entry Transfer Facility as such stockholder may
designate in the box entitled "Special Payment Instructions" on the reverse
hereof. If no such instructions are given, all such Shares not purchased will be
returned by crediting the account at the Book-Entry Transfer Facility designated
on the reverse hereof as the account from which such Shares were delivered.
 
     8. 31% Backup Withholding. In order to avoid backup withholding of Federal
income tax on payments of cash pursuant to the Offer, a stockholder tendering
Shares in the Offer must, unless an exemption applies, provide the Depositary
with such stockholder's correct taxpayer identification number (i.e., social
security number or employer identification number) ("TIN") on the Substitute
Form W-9 below in this Letter of Transmittal and certify under penalties of
perjury that such TIN is correct and that such stockholder is not subject to
backup withholding. If a stockholder does not provide such stockholder's correct
TIN or fails to provide the certifications described above, the Internal Revenue
Service (the "IRS") may impose a $50 penalty on such stockholder and payment of
cash to such stockholder pursuant to the Offer may be subject to backup
withholding of 31%.
 
     Backup withholding is not an additional income tax. Rather, the amount of
the backup withholding may be credited against the Federal income tax liability
of the person subject to the backup withholding, provided that the required
information is given to the IRS. If backup withholding results in an overpayment
of tax, a refund may be obtained by the stockholder upon filing an income tax
return.
 
     The stockholder is required to give the Depositary the TIN of the record
holder of the Shares. If the Shares are held in more than one name or are not in
the name of the actual owner, consult the enclosed "Guidelines for Certification
of Taxpayer Identification Number on Substitute Form W-9" for additional
guidance on which number to report.
 
     The box in Part 3 of Substitute Form W-9 may be checked if the tendering
stockholder has not been issued a TIN and has applied for a TIN or intends to
apply for a TIN in the near future. If the box in Part 3 is checked, the
stockholder or other payee must also complete the Certificate of Awaiting
Taxpayer Identification Number below in order to avoid backup withholding.
Notwithstanding that the box in Part 3 is checked and the Certificate of
Awaiting Taxpayer Identification Number is completed, the Depositary will
withhold 31% on all payments made prior to the time a properly certified TIN is
provided to the Depositary. However, such amounts will be refunded to such
stockholder if a TIN is provided to the Depositary within 60 days.
 
     Certain stockholders (including, among others, all corporations and certain
foreign individuals and entities) are not subject to backup withholding.
Noncorporate foreign stockholders must complete and sign a Form W-8, Certificate
of Foreign Status, a copy of which may be obtained from the Depositary, in order
to avoid backup withholding. See the enclosed "Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9" for more instructions.
<PAGE>   9
 
     9. Requests for Assistance or Additional Copies. Requests for assistance
may be directed to the Information Agent or the Dealer Manager at their
respective addresses or telephone numbers set forth below. Additional copies of
the Offer to Purchase, this Letter of Transmittal, the Notice of Guaranteed
Delivery and the Guidelines for Certification of Taxpayer Identification Number
on Substitute Form W-9 may be obtained from the Information Agent or the Dealer
Manager or from brokers, dealers, banks or trust companies.
 
     10. Lost, Destroyed or Stolen Certificates. If any certificate(s)
representing Shares has been lost, destroyed or stolen, the stockholder should
promptly notify the Depositary by checking the box immediately preceding the
special payment/special delivery instructions and indicating the number of
Shares so lost, destroyed or stolen. The stockholder will then be instructed by
the Depositary as to the steps that must be taken in order to replace the
certificate. This Letter of Transmittal and related documents cannot be
processed until the procedures for replacing lost, destroyed or stolen
certificates have been followed.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL (OR FACSIMILE HEREOF), PROPERLY
COMPLETED AND DULY EXECUTED, WITH ANY REQUIRED SIGNATURE GUARANTEES, OR AN
AGENT'S MESSAGE (TOGETHER WITH SHARE CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY
TRANSFER AND ALL OTHER REQUIRED DOCUMENTS) OR A PROPERLY COMPLETED AND DULY
EXECUTED NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED BY THE DEPOSITARY PRIOR
TO THE EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE).
<PAGE>   10
<TABLE>
<S>                                                                                             <C>
    SIGN                                                                                        SIGN
    HERE                                                                                        HERE
</TABLE>
 
- --------------------------------------------------------------------------------
                                   SIGN HERE
                   (ALSO COMPLETE SUBSTITUTE FORM W-9 BELOW)
 
            --------------------------------------------------------
 
            --------------------------------------------------------
                          (SIGNATURE(S) OF HOLDER(S))
 
            Dated:
            --------------------------------------------------- , 1996
            
 
            (Must be signed by registered holder(s) as name(s)
            appear(s) on the Share Certificate(s) or on a security
            position listing or by person(s) authorized to become
            registered holder(s) by certificates and documents
            transmitted herewith. If signature is by trustees,
            executors, administrators, guardians, attorneys-in-fact,
            officers of corporations or others acting in a fiduciary
            or representative capacity, please provide the following
            information. See Instruction 5.)
 
            Name(s)-------------------------------------------------
 
            --------------------------------------------------------
                                 (PLEASE PRINT)
 
            Capacity (Full title)
                            ----------------------------------------
 
            Address
                  --------------------------------------------------
 
            --------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
            Area Code and Telephone Number (   )
                                         ---------------------------
 
            Taxpayer Identification or Social Security Number (SEE 
            SUBSTITUTE FORM W-9)
                                -----------------------------------
                                              
 
                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 
            Authorized Signature
                            ----------------------------------------
 
            Name ---------------------------------------------------
                                 (PLEASE PRINT)
 
            Name of Firm
                       ---------------------------------------------
 
            Address
                  --------------------------------------------------
                               (INCLUDE ZIP CODE)
 
            Area Code and Telephone Number (   )
                                         ---------------------------
            Dated:
            ------------------------------------------------- , 1996
            
 
<PAGE>   11
                                                PAYER'S NAME: [*]
- --------------------------------------------------------------------------------
<TABLE>
<S>                          <C>                                                <C>
- ------------------------------------------------------------------------------------------------------------
 SUBSTITUTE                  PART 1 -- PLEASE PROVIDE YOUR TIN IN THE BOX AT
 FORM W-9                    RIGHT AND CERTIFY BY SIGNING AND DATING BELOW.     ----------------------------
 DEPARTMENT OF THE TREASURY                                                     Social Security Number
 INTERNAL REVENUE SERVICE
                                                                                OR
 PAYER'S REQUEST FOR                                                            ----------------------------
 TAXPAYER IDENTIFICATION                                                        Employer Identification
 NUMBER (TIN)                                                                   Number(s)
                            --------------------------------------------------------------------------------
                             PART 2 -- Certification -- Under penalties of
                             perjury, I certify that:
                             (1) the number shown on this form is my correct
                                 Taxpayer Identification Number (or I am 
                                 waiting for a number to be issued to me) and             PART 3 --
                             (2) I am not subject to backup withholding                  Awaiting TIN
                                 because (a) I am exempt from backup withholding             / /
                                 or (b) I have not been notified by the Internal  --------------------------
                                 Revenue Service (the "IRS") that I am subject            PART 4 --
                                 to backup as a result of failure to report all           Exempt TIN
                                 interest or dividends or (c) the IRS has                    / /
                                 notified me that I am no longer subject to 
                                 backup withholding.
                            --------------------------------------------------------------------------------
                             CERTIFICATION INSTRUCTIONS -- You must cross out item (2) in Part 2 above if
                             you have been notified by the IRS that you are subject to backup withholding
                             because of under reporting interest or dividends on your tax returns.
                             However, if after being notified by the IRS that you were subject to backup
                             withholding you received another notification from the IRS stating that you
                             are no longer subject to backup withholding, do not cross out such item (2).
                             If you are exempt from backup withholding, check the box in Part 4 above.
- ------------------------------------------------------------------------------------------------------------
 Signature ____________________________  Date ____________, 1996
- ------------------------------------------------------------------------------------------------------------
</TABLE>
 
     YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN
                         PART 3 OF SUBSTITUTE FORM W-9
- --------------------------------------------------------------------------------
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
      I certify under penalties of perjury that a taxpayer identification
 number has not been issued to me, and either (a) I have mailed or delivered an
 application to receive a taxpayer identification number to the appropriate
 Internal Revenue Service Center or Social Security Administration Office or
 (b) I intend to mail or deliver an application in the near future. I
 understand that, if I do not provide a taxpayer identification number to the
 Depositary, 31% of all reportable payments made to me will be withheld, but
 will be refunded if I provide a certified taxpayer identification number
 within 60 days.
 
 -----------------------------------------------------------------------, 1996
               Signature                                  Date
- --------------------------------------------------------------------------------
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER. PLEASE REVIEW
      THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
      NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL INFORMATION.
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
<PAGE>   12
 
                       The Information Agent for the Offer is:
 
                                D. F. KING & CO., INC.
 
                                    77 Water Street
                                  New York, NY 10005
                            Call Toll Free: (800) 848-3374
 
                         The Dealer Manager for the Offer is:
 
                                    CS First Boston
 
                                   Park Avenue Plaza
                                  55 East 52nd Street
                                  New York, NY 10055
                            Call Toll Free: (800) 881-8320

<PAGE>   1
 
                         NOTICE OF GUARANTEED DELIVERY
 
                                      FOR
 
                        TENDER OF SHARES OF COMMON STOCK
 
                                       OF
 
                               ROTO-ROOTER, INC.
 
                                       TO
 
                               CHEMED CORPORATION
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
          TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS
                       EXTENDED (THE "EXPIRATION DATE").
 
     As set forth in the section entitled "The Tender Offer -- Procedure for
Tendering Shares" of the Offer to Purchase (as defined below), and in
Instruction 2 of the related Letter of Transmittal, this Notice of Guaranteed
Delivery, or one substantially in the form hereof, must be used to accept the
Offer if (i) certificates evidencing shares of Common Stock, par value $1.00 per
share (the "Shares"), of Roto-Rooter, Inc., a Delaware corporation (the
"Company"), are not immediately available, (ii) time will not permit all
required documents to reach ChaseMellon Shareholder Services, L.L.C. (the
"Depositary"), prior to the Expiration Date or (iii) the procedures for
book-entry transfer cannot be completed on a timely basis. This Notice of
Guaranteed Delivery may be delivered by hand or transmitted by facsimile
transmission or mail to the Depositary. See the section entitled "The Tender
Offer -- Procedure for Tendering Shares" of the Offer to Purchase. All
capitalized terms used but not defined herein shall have the meaning ascribed to
them in the Offer to Purchase.
 
                        The Depositary for the Offer is:
                    ChaseMellon Shareholder Services, L.L.C.
 
<TABLE>
<S>                               <C>                               <C>
      By Overnight Delivery:                   By Mail:                          By Hand:
ChaseMellon Shareholder Services, ChaseMellon Shareholder Services, ChaseMellon Shareholder Services,
               L.L.C.                           L.L.C.                            L.L.C.
        85 Challenger Road                   P.O. Box 396                120 Broadway, 13th Floor
    Ridgefield Park, NJ 07660           Bowling Green Station                  New York, NY
 Attn: Reorganization Department          New York, NY 10274

                                        For Information, Call:
                                            1-800-777-3674
</TABLE>
 
DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS SET
    FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION
      OTHER THAN AS SET FORTH ABOVE, DOES NOT CONSTITUTE A VALID DELIVERY.
 
     This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an Eligible Institution
(as defined below) under the instructions thereto, such signature guarantee must
appear in the applicable space provided in the signature box on the Letter of
Transmittal.
<PAGE>   2
 
LADIES AND GENTLEMEN:
 
     The undersigned hereby tenders to Chemed Corporation, a Delaware
corporation (the "Purchaser"), upon the terms and subject to the conditions set
forth in the Offer to Purchase dated August 14, 1996 (the "Offer to Purchase"),
and the related Letter of Transmittal (which, together with any amendments or
supplements thereof, collectively constitute the "Offer"), receipt of which is
hereby acknowledged, the number of Shares specified below pursuant to the
guaranteed delivery procedure set forth in the section entitled "The Tender
Offer -- Procedure for Tendering Shares" of the Offer to Purchase.
 
<TABLE>
<S>                                                     <C>
Number of Shares:                                        Dated:                                 , 1996
                 ----------------------------                  --------------------------------

Certificate Nos.                                         Name(s) of Record Holder(s): 
  (if available):                                                                     ----------------
                  ---------------------------            ---------------------------------------------
(Check ONE box if Shares will                            --------------------------------------------- 
  be tendered by book-entry transfer)                                    (PLEASE PRINT)
  / /  The Depositary Trust Company                      
  / /  Midwest Securities Trust Company                  Address(es):                 
  / /  Philadelphia Depository Trust Company                          --------------------------------

                                                         ---------------------------------------------
Account Number:                                                            (ZIP CODE)
                -----------------------------            
                                                         Area Code and Tel. No.:
                                                                                 ---------------------
                                                         Signature(s):
                                                                       -------------------------------
                                                         --------------------------------------------- 
</TABLE>
 
                                   GUARANTEE
 
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)
 
     The undersigned, a participant in the Security Transfer Agents Medallion
Program, the New York Stock Exchange Medallion Signature Program or the Stock
Exchange Medallion Program (each, an "Eligible Institution"), hereby guarantees
delivery to the Depositary, at one of its addresses set forth above, of
certificates evidencing the Shares tendered hereby in proper form for transfer,
or confirmation of book-entry transfer of such Shares into the Depositary's
accounts at The Depository Trust Company, Midwest Securities Trust Company or
Philadelphia Depository Trust Company, in each case with delivery of a properly
completed and duly executed Letter of Transmittal (or facsimile thereof) with
any required signature guarantees, or an Agent's Message (as defined in the
Offer to Purchase), and any other documents required by the Letter of
Transmittal, within three trading days after the date of execution of this
Notice of Guaranteed Delivery. A "trading day" is any day on which the Nasdaq
National Market is open for business.
 
     The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal (or, in
the case of book-entry procedures, an Agent's Message) and certificates for
Shares to the Depositary within the time period shown herein. Failure to do so
could result in a financial loss to such Eligible Institution.
 
<TABLE>
<S>                                            <C>
Name of Firm:
              ------------------------------    -----------------------------------
                                                       (AUTHORIZED SIGNATURE)
Address:
         -----------------------------------    Name:
- --------------------------------------------         ------------------------------
                  (ZIP CODE)                                 (PLEASE PRINT)
Area Code and Tel No.:
                      ----------------------    Title:
                                                        ---------------------------
                                                Dated:
                                                        ---------------------------
</TABLE>
 
NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE. CERTIFICATES FOR
      SHARES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.

<PAGE>   1
 
[CS First Boston Logo]                               CS First Boston Corporation
                                                     55 East 52nd Street
                                                     Park Avenue Plaza
                                                     New York, NY 10055
                                                     Tel: (212) 909-2000
 
                           OFFER TO PURCHASE FOR CASH
                 ANY AND ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
 
                               ROTO-ROOTER, INC.
                                       AT
 
                              $41.00 NET PER SHARE
                                       BY
 
                               CHEMED CORPORATION
 
       THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
CITY TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS EXTENDED (THE
"EXPIRATION DATE").
 
                                                                 August 14, 1996
 
To Brokers, Dealers, Commercial Banks,
   Trust Companies and Other Nominees:
 
     We have been appointed by Chemed Corporation, a Delaware corporation, (the
"Purchaser"), to act as the Dealer Manager in connection with its offer to
purchase any and all outstanding shares of common stock, par value $1.00 per
share (the "Shares"), of Roto-Rooter, Inc. a Delaware corporation (the
"Company"), at a price of $41.00 per Share, net to the seller in cash, upon the
terms and subject to the conditions set forth in the Purchaser's Offer to
Purchase, dated August 14, 1996 (the "Offer to Purchase"), and the related
Letter of Transmittal (which, together with any amendments or supplements
thereto, collectively constitute the "Offer") enclosed herewith. All capitalized
terms used herein but not defined herein shall have the meaning ascribed to them
in the Offer to Purchase.

   THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING
   TENDERED OR UPON A VOTE BY THE HOLDERS OF SHARES OTHER THAN THE PURCHASER
    OR APPROVAL OF A SPECIAL COMMITTEE OF THE BOARD OF DIRECTORS OF THE
     COMPANY. THE OFFER IS, HOWEVER, SUBJECT TO CERTAIN CONDITIONS. SEE
       THE SECTION ENTITLED "THE TENDER OFFER -- CERTAIN CONDITIONS OF
        THE OFFER" OF THE OFFER TO PURCHASE.
 
     Enclosed herewith are copies of the following documents:
 
          1. The Offer to Purchase dated August 14, 1996;
 
          2. The Letter of Transmittal to be used by holders of Shares in
     accepting the Offer and tendering Shares;
 
          3. The Notice of Guaranteed Delivery to be used to accept the Offer if
     the certificates evidencing such Shares (the "Share Certificates") have not
     yet been issued, are not immediately available or time will not permit all
     required documents to reach ChaseMellon Shareholder Services, L.L.C. (the
     "Depositary") prior to the Expiration Date or the procedure for book-entry
     transfer cannot be completed on a timely basis;
 
          4. A letter which may be sent to your clients for whose accounts you
     hold Shares registered in your name or in the name of your nominees, with
     space provided for obtaining such clients' instructions with regard to the
     Offer;
<PAGE>   2
 
          5. Guidelines of the Internal Revenue Service for Certification of
     Taxpayer Identification Number on Substitute Form W-9, providing
     information relating to backup federal income tax withholding; and
 
          6. Return envelope addressed to the Depositary.
 
     Upon the terms and subject to the conditions of the Offer, the Purchaser
will accept for payment and pay for any and all Shares validly tendered prior to
the Expiration Date and not theretofore withdrawn in accordance with the
provisions set forth in the section entitled "The Tender Offer -- Withdrawal
Rights" of the Offer to Purchase. Payment for Shares accepted for payment
pursuant to the Offer will in all cases be made only after timely receipt by the
Depositary of (a) the Share Certificates or timely confirmation of a book-entry
transfer of such Shares, if such procedure is available, into the Depositary's
accounts at The Depository Trust Company, Midwest Securities Trust Company or
Philadelphia Depository Trust Company pursuant to the procedures set forth in
the Offer to Purchase, (b) the Letter of Transmittal (or facsimile thereof),
properly completed and duly executed, or an Agent's Message (as defined in the
Offer to Purchase) and (c) any other documents required by the Letter of
Transmittal.
 
     PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00
MIDNIGHT, NEW YORK CITY TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER
IS EXTENDED. WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE.
 
     The Purchaser will not pay for fees or commissions to any broker or dealer
or other person (other than to the Dealer Manager and the Information Agent) for
soliciting tenders of Shares pursuant to the Offer. You will be reimbursed upon
request for customary mailing and handling expenses incurred by you in
forwarding the enclosed materials to your customers.
 
     The Purchaser will pay any stock transfer taxes incident to the transfer to
it of validly tendered Shares, except as otherwise provided in Instruction 6 of
the Letter of Transmittal.
 
     In order to take advantage of the Offer, a duly executed and properly
completed Letter of Transmittal (or facsimile thereof), with any required
signature guarantees and any other required documents, should be sent to the
Depositary, and certificates evidencing the tendered Shares should be delivered
or such Shares should be tendered by book-entry transfer, all in accordance with
the Offer to Purchase and the Instructions set forth in the Letter of
Transmittal.
 
     If stockholders wish to tender Shares, but such stockholders are unable to
forward their certificates or other required documents prior to the Expiration
Date, a tender may be effected by following the guaranteed delivery procedures
specified in the section entitled "The Tender Offer -- Procedure for Tendering
Shares" of the Offer to Purchase.
 
     Any inquiries you may have with respect to the Offer should be addressed to
the Dealer Manager or the Information Agent at their respective addresses and
telephone numbers set forth on the back cover page of the Offer to Purchase.
 
     Additional copies of the enclosed materials may be obtained by calling the
Information Agent, D.F. King & Co., Inc. at 1-800-848-3374 (Toll Free), or from
brokers, dealers, banks or trust companies.
 
                                         Very truly yours,
 
                                         CS FIRST BOSTON CORPORATION
 
     NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY OTHER PERSON THE AGENT OF THE PURCHASER, THE DEPOSITARY, THE INFORMATION
AGENT OR THE DEALER MANAGER OR AUTHORIZE YOU OR ANY OTHER PERSON TO GIVE ANY
INFORMATION OR MAKE ANY REPRESENTATION ON BEHALF OF ANY OF THEM WITH RESPECT TO
THE OFFER NOT CONTAINED IN THE OFFER TO PURCHASE OR THE LETTER OF TRANSMITTAL.

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                 ANY AND ALL OUTSTANDING SHARES OF COMMON STOCK
 
                                       OF
 
                               ROTO-ROOTER, INC.
                                       AT
 
                              $41.00 NET PER SHARE
 
                                       BY
 
                               CHEMED CORPORATION

  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
   TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS EXTENDED (THE
                              "EXPIRATION DATE").
 
                                                                 August 14, 1996
 
To Our Clients:
 
     Enclosed for your consideration is an Offer to Purchase dated August 14,
1996 (the "Offer to Purchase") and the related Letter of Transmittal (the
"Letter of Transmittal" and, together with the Offer to Purchase, the "Offer")
relating to the offer by Chemed Corporation, a Delaware corporation (the
"Purchaser"), to purchase any and all outstanding shares of Common Stock, par
value $1.00 per share (the "Shares"), of Roto-Rooter, Inc., a Delaware
corporation (the "Company"), at a price of $41.00 per Share, net to the seller
in cash, upon the terms and subject to the conditions set forth in the Offer.
 
     Stockholders whose certificates evidencing Shares ("Share Certificates")
are not immediately available or who cannot deliver their Share Certificates and
all other documents required by the Letter of Transmittal to ChaseMellon
Shareholder Services, L.L.C. (the "Depositary"), prior to the Expiration Date or
who cannot complete the procedure for delivery by book-entry transfer to the
Depositary's account at the Book-Entry Transfer Facility (as defined in the
Offer to Purchase) on a timely basis and who wish to tender their Shares must do
so pursuant to the guaranteed delivery procedure described in the section
entitled "The Tender Offer -- Procedure for Tendering Shares" of the Offer to
Purchase. See Instruction 2 of the Letter of Transmittal. Delivery of documents
to a Book-Entry Transfer Facility in accordance with the Book-Entry Transfer
Facility's procedures does not constitute delivery to the Depositary.
 
     THIS MATERIAL IS BEING SENT TO YOU AS THE BENEFICIAL OWNER OF THE SHARES
HELD BY US FOR YOUR ACCOUNT BUT NOT REGISTERED IN YOUR NAME. WE ARE THE HOLDER
OF RECORD OF THE SHARES HELD BY US FOR YOUR ACCOUNT. A TENDER OF SUCH SHARES CAN
BE MADE ONLY BY US AS THE HOLDER OF RECORD AND PURSUANT TO YOUR INSTRUCTIONS.
THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR YOUR INFORMATION ONLY AND
CANNOT BE USED BY YOU TO TENDER SHARES HELD BY US FOR YOUR ACCOUNT.
 
     We request instructions as to whether you wish to have us tender on your
behalf any of or all the Shares held by us for your account, upon the terms and
conditions set forth in the Offer.
 
     Your attention is directed to the following:
 
          1. The offer price is $41.00 per Share, net to the seller in cash.
 
          2. The Offer and withdrawal rights will expire at 12:00 Midnight, New
     York City time, on Wednesday, September 11, 1996, unless the Offer is
     extended.
<PAGE>   2
 
          3. The Offer is being made for any and all outstanding Shares.
 
          4. The Purchaser currently owns 2,990,333 Shares, representing
     approximately 58% of the outstanding Shares.
 
          5. The Offer is not conditioned on any minimum number of Shares being
     tendered or upon a vote by the holders of Shares other than the Purchaser
     or approval of a special committee of the Board of Directors of the
     Company. The Offer is, however, subject to certain conditions. See the
     section entitled "The Tender Offer -- Certain Conditions of the Offer" of
     the Offer to Purchase.
 
          6. Tendering stockholders will not be obligated to pay brokerage fees
     or commissions or, except as set forth in Instruction 6 of the Letter of
     Transmittal, stock transfer taxes on the purchase of Shares by the
     Purchaser pursuant to the Offer.
 
     The Offer is made solely by the Offer to Purchase and the related Letter of
Transmittal and is being made to all holders of Shares. The Purchaser is not
aware of any state where the making of the Offer is prohibited by administrative
or judicial action pursuant to any valid state statute. If the Purchaser becomes
aware of any valid state statute prohibiting the making of the Offer or the
acceptance of Shares pursuant thereto, the Purchaser will make a good faith
effort to comply with such state statute. If, after such good faith effort, the
Purchaser cannot comply with such state statute, the Offer will not be made to
(nor will tenders be accepted from or on behalf of) the holders of Shares in
such state. In any jurisdiction where the securities, blue sky or other laws
require the Offer to be made by a licensed broker or dealer, the Offer shall be
deemed to be made on behalf of the Purchaser by CS First Boston Corporation, the
Dealer Manager, or one or more registered brokers or dealers licensed under the
laws of such jurisdiction.
 
     If you wish to have us tender any of or all the Shares held by us for your
account, please so instruct us by completing, executing, detaching and returning
to us the instruction form contained in this letter. An envelope to return your
instructions to us is enclosed. If you authorize the tender of your Shares, all
such Shares will be tendered unless otherwise specified on the instruction form
contained in this letter. YOUR INSTRUCTIONS SHOULD BE FORWARDED TO US IN AMPLE
TIME TO PERMIT US TO SUBMIT A TENDER ON YOUR BEHALF PRIOR TO THE EXPIRATION
DATE.
<PAGE>   3
 
                          INSTRUCTIONS WITH RESPECT TO
                         THE OFFER TO PURCHASE FOR CASH
                 ANY AND ALL OUTSTANDING SHARES OF COMMON STOCK
 
                                       OF
 
                               ROTO-ROOTER, INC.
 
     The undersigned acknowledge(s) receipt of your letter and the enclosed
Offer to Purchase dated August 14, 1996 and the related Letter of Transmittal
(collectively, the "Offer"), in connection with the offer by Chemed Corporation,
a Delaware corporation (the "Purchaser"), to purchase any and all outstanding
shares of Common Stock, par value $1.00 per share (the "Shares"), of
Roto-Rooter, Inc., a Delaware corporation.
 
     This will instruct you to tender to the Purchaser the number of Shares
indicated below (or if no number is indicated below, all Shares) held by you for
the account of the undersigned, upon the terms and subject to the conditions set
forth in the Offer.
 
<TABLE>
<S>                                                   <C>
- -------------------------------------------------
        Number of Shares to be Tendered*                                 SIGN HERE 

          --------------------- Shares                -------------------------------------------------
  
- -------------------------------------------------     -------------------------------------------------
                                                                        (SIGNATURES)
Account Number: 
                -----------------------               -------------------------------------------------

Dated:               , 1996                           -------------------------------------------------
      --------------                                         (PLEASE TYPE OR PRINT NAME(S) HERE)

                                                      -------------------------------------------------

                                                      -------------------------------------------------
                                                           (PLEASE TYPE OR PRINT ADDRESS(ES) HERE)

                                                      -------------------------------------------------
                                                              (AREA CODE AND TELEPHONE NUMBER)

                                                      -------------------------------------------------
                                                                 (TAXPAYER IDENTIFICATION OR
                                                                 SOCIAL SECURITY NUMBER(S))
                                                      
                                                      
</TABLE>
 
- ---------------
* Unless otherwise indicated, it will be assumed that all Shares held by us for
  your account are to be tendered.

<PAGE>   1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER. -- Social Security numbers have nine digits separated by two hyphens:
i.e. 000-00-0000. Employer identification numbers have nine digits separated by
only one hyphen: i.e. 00-0000000. The table below will help determine the number
to give the payer.
 
<TABLE>
<S>                                   <C>
- ---------------------------------------------------------
                                      GIVE THE
           FOR THIS TYPE OF ACCOUNT:  SOCIAL SECURITY
                                      NUMBER OF--
- ---------------------------------------------------------
  1. An individual's account          The individual

  2. Two or more individuals (joint   The actual owner of
     account)                         the account or, if
                                      combined funds, any
                                      one of the
                                      individuals(1)

  3. Husband and wife (joint          The actual owner of
     account)                         the account or, if
                                      joint funds, either
                                      person(1)

  4. Custodian account of a minor     The minor(2)
     (Uniform Gift to Minors Act)

  5. Adult and minor (joint account)  The adult or, if
                                      the minor is the
                                      only contributor,
                                      the minor(1)

  6. Account in the name of guardian  The ward, minor, or
     or committee for a designated    incompetent
     ward, minor, or incompetent      person(3)
     person

  7. a. The usual revocable savings   The grantor-
        trust account (grantor is     trustee(1)
        also trustee)
     b. So-called trust account that  The actual owner(4)
     is not a legal or valid trust
        under State law

  8. Sole proprietorship account      The Owner(4)

- ---------------------------------------------------------
                                      GIVE THE EMPLOYER
           FOR THIS TYPE OF ACCOUNT:  IDENTIFICATION
                                      NUMBER OF--
- ---------------------------------------------------------
  9. A valid trust, estate, or        Legal entity (Do
     pension trust                    not furnish the
                                      identifying number
                                      of the personal
                                      representative or
                                      trustee unless the
                                      legal entity itself
                                      is not designated
                                      in the account
                                      title.)(5)

 10. Corporate account                The corporation

 11. Religious, charitable, or        The organization
     educational organization
     account

 12. Partnership account held in the  The partnership
     name of the partnership

 13. Association, club, or other      The organization
     tax-exempt organization

 14. A broker or registered nominee   The broker or
                                      nominee

 15. Account with the Department of   The public entity
     Agriculture in the name of a
     public entity (such as a State
     or local government, school
     district, or prison) that
     receives agricultural program
     payments
- ---------------------------------------------------------
</TABLE>
 
(1) List all names first and circle the name of the person whose number you
    furnish.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
(4) Provide the name of the owner.
(5) List all names first and circle the name of the legal trust, estate, or
    pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.
<PAGE>   2
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
                                     PAGE 2
 
OBTAINING A NUMBER
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service and apply for a
number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
Payees specifically exempted from backup withholding on ALL payments include the
following:
  - A corporation.
  - A financial institution.
  - An organization exempt from tax under section 501(a), of the Internal
    Revenue Code of 1986, as amended (the "Code"), or an individual retirement
    plan.
  - The United States or any agency or instrumentality thereof.
  - A State, the District of Columbia, a possession of the United States, or any
    subdivision or instrumentality thereof.
  - A foreign government, a political subdivision of a foreign government, or
    any agency or instrumentality thereof.
  - An international organization or any agency, or instrumentality thereof.
  - A registered dealer in securities or commodities registered in the U.S. or a
    possession of the U.S.
  - A real estate investment trust.
  - A common trust fund operated by a bank under section 584(a) of the Code.
  - An exempt charitable remainder trust, or a non-exempt trust described in
    section 4947(a)(1) of the Code.
  - An entity registered at all times under the Investment Company Act of 1940.
  - A foreign central bank of issue.
 
PAYMENTS NOT GENERALLY SUBJECT TO BACKUP
WITHHOLDING
Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
  - Payments to nonresident aliens subject to withholding under section 1441 of
    the Code.
  - Payments to partnerships not engaged in a trade or business in the U.S. and
    which have at least one nonresident partner.
  - Payments of patronage dividends where the amount received is not paid in
    money.
  - Payments made by certain foreign organizations.
Payments of interest not generally subject to backup withholding include the
following:
  - Payments of interest on obligations issued by individuals. Note: A Payee may
    be subject to backup withholding if this interest is $600 or more and is
    paid in the course of the payer's trade or business and such Payee has not
    provided its correct taxpayer identification number to the payer.
 
  - Payments of tax-exempt interest (including exempt-interest dividends under
    section 852) of the Code.
  - Payments described in section 6049(b)(5) to nonresident aliens.
  - Payments on tax-free covenant bonds under section 1451 of the Code.
  - Payments made by certain foreign organizations.
  - Payments made to a nominee.
 
EXEMPT PAYEES DESCRIBED ABOVE MUST STILL COMPLETE THE SUBSTITUTE FORM W-9 TO
AVOID POSSIBLE ERRONEOUS BACKUP WITHHOLDING. FILE SUBSTITUTE FORM W-9 WITH THE
PAYER, FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE
OF THE FORM, AND RETURN IT TO THE PAYER. IF THE PAYMENTS ARE INTEREST,
DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO SIGN AND DATE THE FORM.
 
  Certain payments other than interest, dividends, and patronage dividends, that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6045, and 6050A of the Code.
 
PRIVACY ACT NOTICE.--Section 6109 of the Code requires most recipients of
dividends, interest, or other payments to give taxpayer identification numbers
to payers who must report the payments to IRS. IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Payers must generally withhold 31%
of taxable interest, dividends, and certain other payments to a payee who does
not furnish a taxpayer identification number to a payer. Certain penalties may
also apply.
 
PENALTIES
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. If you fail
to furnish your taxpayer identification number to a payer, you are subject to a
penalty of $50 for each such failure unless your failure is due to reasonable
cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. If you make
a false statement with no reasonable basis that results in no imposition of
backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. Falsifying certifications or
affirmations may subject you to criminal penalties including fines and/or
imprisonment.
(4) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS. If you fail to
include any portion of an includable payment for interest, dividends or
patronage dividends in gross income and such failure is due to negligence, a
penalty of 20% is imposed on any portion of an underpayment attributable to that
failure.
 
                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                   CONSULTANT OR THE INTERNAL REVENUE SERVICE

<PAGE>   1
                                  NEWS RELEASE

                        [CHEMED CORPORATION LETTERHEAD]


CONTACT:  TIMOTHY S. O'TOOLE                               FOR IMMEDIATE RELEASE
          Chemed Corporation
          (513) 762-6702



        CINCINNATI, OHIO, August 8, 1996 -- Chemed Corporation (NYSE: CHE)
announced today that it intends to commence a tender offer to acquire any and
all of the outstanding shares of common stock of Roto-Rooter, Inc. (NASDAQ:
ROTO) currently not held by Chemed (approximately 2,160,000 shares,
representing approximately 42 percent of the outstanding shares), for a cash
price of $41.00 per share. The offer is expected to commence by Wednesday,
August 14, 1996. The offer will not be conditioned upon any minimum number of
shares being tendered.

        Edward L. Hutton, Chairman of Chemed, stated: "The Chemed board of
directors believes that this offer is fair to Roto-Rooter's stockholders and
represents an opportunity for Roto-Rooter stockholders to realize significant
value for their shares. In connection with the offer, CS First Boston has given
Chemed's board an opinion as to the fairness from a financial point of view of
the offer to Roto-Rooter stockholders."

        Chemed Corporation, headquartered in Cincinnati, is a diversified
public corporation with strategic positions in medical and dental supply
manufacturing for the alternate-care and hospital markets, home health care
services and hospice care; plumbing, drain cleaning, and appliance and air
conditioning repair and maintenance through the sale of service contracts; and
sanitary maintenance products and services.

        Roto-Rooter, Inc. headquartered in Cincinnati, is the largest provider
of sewer and drain cleaning services in the United States.


                                   # # #

<PAGE>   1
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
   This announcement is neither an offer to purchase nor a solicitation of an
 offer to sell Shares. The Offer is made solely by the Offer to Purchase dated
  August 14, 1996 and the related Letter of Transmittal and is not being made
    to (nor will tenders be accepted from or on behalf of) holders of Shares
     in any jurisdiction in which the making of the Offer or the acceptance
     thereof would not be in compliance with the laws of such jurisdiction.
    In those jurisdictions where securities, blue sky or other laws require
         the Offer to be made by a licensed broker or dealer, the Offer
            shall be deemed to be made on behalf of the Purchaser by
              CS First Boston Corporation ("CS First Boston"), the
              Dealer Manager, or one or more registered brokers or
             dealers licensed under the laws of such jurisdiction.

                      Notice of Offer to Purchase for Cash
                 Any and All Outstanding Shares of Common Stock

                                       of

                               ROTO-ROOTER, INC.

                                       at

                              $41.00 NET PER SHARE

                                       by

                               CHEMED CORPORATION

     Chemed Corporation, a Delaware corporation (the "Purchaser"), is offering
to purchase any and all outstanding shares of Common Stock, par value $1.00 per
share (the "Shares"), of Roto-Rooter, Inc., a Delaware corporation (the
"Company"), for a purchase price of $41.00 per Share (the "Offer Price"), net
to the seller in cash, upon the terms and subject to the conditions set forth in
the Offer to Purchase dated August 14, 1996 (the "Offer to Purchase") and in the
related Letter of Transmittal (which, together with any amendments or
supplements thereto, collectively constitute the "Offer").

- -------------------------------------------------------------------------------
    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
   CITY TIME, ON WEDNESDAY, SEPTEMBER 11, 1996, UNLESS THE OFFER IS EXTENDED.
- -------------------------------------------------------------------------------

     CHEMED CURRENTLY OWNS 2,990,333 SHARES, REPRESENTING APPROXIMATELY 58% OF
THE OUTSTANDING SHARES.

     THE OFFER IS NOT CONDITIONED ON ANY MINIMUM NUMBER OF SHARES BEING TENDERED
OR ON A VOTE BY THE HOLDERS OF SHARES OTHER THAN THE PURCHASER OR APPROVAL OF
THE BOARD OF DIRECTORS OF THE COMPANY OR ANY COMMITTEE THEREOF. THE OFFER IS,
HOWEVER, SUBJECT TO CERTAIN CONDITIONS.

     For purposes of the Offer, the Purchaser will be deemed to have accepted
for payment, and thereby purchased, Shares properly tendered to the Purchaser
and not withdrawn as, if and when the Purchaser gives oral or written notice to
ChaseMellon Shareholder Services, L.L.C. (the "Depositary") of the Purchaser's
acceptance for payment of such Shares. Payment for Shares accepted for payment
pursuant to the Offer will be made by deposit of the Offer Price therefor with
the Depositary, which will act as agent for tendering stockholders for the
purpose of receiving payment from the Purchaser and transmitting payment to
tendering stockholders. Payment for Shares accepted for payment pursuant to the
Offer will in all cases be made only after timely receipt by the Depositary of
(a) certificates for (or a timely Book-Entry Confirmation (as defined in the
Offer to Purchase) with respect to) such Shares, (b) a Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, with any required
signature guarantees, or, in the case of a book-entry transfer, an Agent's
Message (as defined in the Offer to Purchase), and (c) any other documents
required by the Letter of Transmittal. Under no circumstances will any interest
be paid on the Offer Price for tendered Shares, regardless of any extension of
the Offer or any delay in making such payment.

<PAGE>   2
        Except as otherwise provided below, tenders of Shares will be
irrevocable. Shares tendered pursuant to the Offer may be withdrawn pursuant to
the procedures set forth below at any time prior to the Expiration Date and,
unless theretofore accepted for payment and paid for by the Purchaser pursuant
to the Offer, may also be withdrawn at any time after Friday, October 11, 1996.
The term "Expiration Date" means 12:00 Midnight, New York City time, on
Wednesday, September 11, 1996, unless and until the Purchaser shall have
extended the period of time during which the Offer is open, in which event the
term "Expiration Date" shall mean the latest time and date at which the Offer,
as so extended by the Purchaser, shall expire. For a withdrawal to be
effective, a written or facsimile transmission notice of withdrawal must be
timely received by the Depositary at one of its addresses set forth below and
must specify the name of the person having tendered the Shares to be withdrawn,
the number of Shares to be withdrawn and the name of the registered holder of
the Shares to be withdrawn, if different from the name of the person who
tendered the Shares. If certificates for Shares have been delivered or
otherwise identified to the Depositary, then, prior to the physical release of
such certificates, the serial numbers shown on such certificates must be
submitted to the Depositary and, unless such Shares have been tendered by an
Eligible Institution (as defined in the Offer to Purchase), the signatures on
the notice of withdrawal must be guaranteed by an Eligible Institution. If
Shares have been delivered pursuant to the procedures for book-entry transfer
as set forth in the Offer to Purchase, any notice of withdrawal must also
specify the name and number of the account at the appropriate Book-Entry
Transfer Facility (as defined in the Offer to Purchase) to be credited with the
withdrawn Shares and otherwise comply with such Book-Entry Transfer Facility's
procedures. Withdrawals of tenders of Shares may not be rescinded, and any
Shares properly withdrawn will thereafter be deemed not validly tendered for
any purposes of the Offer. However, withdrawn Shares may be retendered by again
following one of the procedures described in the Offer to Purchase at any time
prior to the Expiration Date. All questions as to the form and validity
(including time of receipt) of notices of withdrawal will be determined by the
Purchaser in its sole discretion, which determination will be final and binding.

        Subject to the applicable rules and regulations of the Securities and
Exchange Commission, the Purchaser expressly reserves the right, in its sole
discretion, at any time or from time to time, and regardless of whether or not
any of the events set forth in the section entitled "The Tender Offer - Certain
Conditions of the Offer" of the Offer to Purchase shall have occurred or shall
have been determined by the purchaser to have occurred, to (a) extend the
period of time during which the Offer is open, and thereby delay acceptance for
payment of, and payment for, any Shares, by giving oral or written notice of
such extension to the Depositary and (b) amend the Offer in any other respect
by giving oral or written notice of such amendment to the Depositary.

        The Offer to Purchase and related Letter of Transmittal and other
relevant materials are being mailed by the Purchaser to record holders of
Shares, and will be furnished to brokers, dealers, banks, trust companies and
similar persons whose names, or the names of whose nominees, appear on the
stockholder lists, or, if applicable, who are listed as participants in a
clearing agency's security position listing, for subsequent transmittal to
beneficial owners of Shares.

        THE OFFER TO PURCHASE AND LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH RESPECT TO
THE OFFER.

<PAGE>   3
        Questions and requests for assistance or for copies of the Offer
to Purchase, the Letter of Transmittal and the Notice of Guaranteed Delivery
may be directed to the Information Agent or the Dealer Manager at their
respective telephone numbers and locations listed below, and copies will be 
furnished promptly at the Purchaser's expense. No fees or commissions will be 
payable to brokers, dealers or other persons other than the Information Agent 
and the Dealer Manager for soliciting tenders of Shares pursuant to the Offer.

                        The Depositary for the Offer is:

                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

 By Overnight Delivery:            By Mail:                   By Hand:

ChaseMellon Shareholder     ChaseMellon Shareholder     ChaseMellon Shareholder
    Services, L.L.C.            Services, L.L.C.             Services, L.L.C.
   85 Challenger Road             P.O. Box 396          120 Broadway, 13th Floor
Ridgefield Park, NJ 07660    Bowling Green Station             New York, NY
Attention: Reorganization      New York, NY 10274
       Department

                    The Information Agent for the Offer is:

                             D.F. KING & CO., INC.
                                77 Water Street
                               New York, NY 10005
                         Call Toll Free: (800) 848-3374


                      The Dealer Manager for the Offer is:

                                CS FIRST BOSTON
                               Park Avenue Plaza
                              55 East 52nd Street
                               New York, NY 10055
                         Call Toll Free: (800) 881-8320


August 14, 1996


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