<PAGE>
EXHIBIT 24
AAF-MCQUAY INC.
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS that each of the undersigned Directors of
AAF-McQuay Inc. hereby constitutes and appoints Ho Nyuk Choy, Bruce D.
Krueger and either of them, the true and lawful agents and attorneys-in-fact
of the undersigned with full power and authority in any of said agents and
attorneys-in-fact, to sign for the undersigned in their respective names as
Directors of AAF-McQuay Inc., the Annual Report on Form 10-K, and any and all
further amendments to said Report, hereby ratifying and confirming all acts
taken by any such agent and attorney-in-fact, as herein authorized.
Dated: September 19, 2000
/s/ Quek Leng Chan /s/ Ho Nyuk Choy
---------------------------------- ----------------------------------
Quek Leng Chan Ho Nyuk Choy
/s/ Roger Tan Kim Hock /s/ Liu Wan Min
---------------------------------- ----------------------------------
Roger Tam Kim Hock Liu Wan Min
/s/ Gerald L. Boehrs
----------------------------------
Gerald L. Boehrs
