<PAGE>
SUBSIDIARIES OF YORK RESEARCH CORPORATION
Set forth below are the names of all subsidiaries of York
Research Corporation ("York") required to be listed on Exhibit 21 to York's
Annual Report on Form 10-K for the year ended February 28, 2000. Indented
companies are direct subsidiaries of the company under which they are indented.
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<CAPTION>
Percentage
Owned by State of
Immediate Incorporation
Parent or Formation
------------ --------------
<S> <C> <C>
York Research Corporation (Parent) N/A Delaware
B-41 Management Corporation 100% Delaware
B-41 Associates L.P. (1) Delaware
Brooklyn Navy Yard Power LLC 100% Delaware
Cogeneration Technologies, Inc. 100% Delaware
Warbasse Power I LLC 100% Delaware
B-41 Associates L.P. (2) Delaware
York Cogen Partners L.P. 90% Delaware
Warbasse Power II LLC 100% Delaware
B-41 Associates L.P. (3) Delaware
FBL Medical Computer
Specialists, Inc. 100% New Jersey
York Internet Power Services, Inc. 100% New York
York Research Canada, Inc. 100% Canada
York Windowpower Corp. 100% Canada
North American Energy Conservation Inc. 85% Delaware
NAEC Energy Services Company, Inc. 100% Delaware
York T&T Holdings, Inc. 100% Delaware
York Holdings (Caymans) L.L.C. 100% Cayman Islands
York Ex International S.R.L. 100% Barbados, B.W.I.
York Holdings (Barbados) S.R.L. 100% Barbados, B.W.I.
InnCOGEN, Limited 100% Republic of
Trinidad & Tobago
Big Spring Holdings, Inc. 100% Delaware
Big Spring Texas Energy Management, Inc. 100% Delaware
New World Power Texas Renewable
Energy L.P. 100% Delaware
York Greek Holdings (Cayman) Limited 100% Cayman Islands
York Mediterranean Energy Limited 50% Cayman Islands
York Aeolean Research Hellas
Single Person Limited Liability Company 100% Greece
York Aeolean Constructive
Single Person Limited Liability Company 100% Greece
</TABLE>
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<TABLE>
<CAPTION>
Percentage
Owned by State of
Immediate Incorporation
Parent or Formation
------------ --------------
<S> <C> <C>
West Texas Renewables Holdings, Inc. 100% Delaware
West Texas Renewables
Limited Partnership 1% Delaware
York Windpower, Inc. 100% Delaware
York Caribbean Windpower LLC 100% Cayman Islands
York Energy Holdings, Inc. 100% Delaware
York Greenpower Corporation 100% Delaware
DD-2 Facilities Corporation 100% Delaware
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(1) 5% of Profits
9.8% of Losses
9.8% of Depreciation
(2) 22% of Profits
1% of Losses
1% of Depreciation
(3) 53% of Profits
1% of Losses
1% of Depreciation
2