• AAON

• AC&C Painting and Plastering, Inc.

• ALCO Manufacturing, Inc.

• Addison Products Co.

• Air Conditioning Exchange, Inc.

• Air Rover, Inc.

• Amana Appliances

• American Geo Thermal

• American Standard Heating and Air Conditioning

• Arcoaire Heating & Cooling Products

• Bard Manufacturing Company

• Cadet Manufacturing Company

• Canadian Cedar Log

• Chain Link Systems

• Clestra Cleanroom

• Climate Master, Inc. - USA

• Coil Company

• Cold Point Corporation

• Comfortmaker

• Commercial Environmental Systems Group

• Compu-Aire

• Data Aire

• Delval Equipment Corporation

• Des Champs Laboratories Incorporated

• Dunham-Bush, Inc.

• Edward J. Cansino & Associates

• Edwards Engineering Corp.

• Ellis & Watts

• Enviromaster International

• Evcon Industries (York International Corp.)

• F H P Mfg.

• First Co.

• Francer Industries

• Friedrich Air Conditioning Co.

• Gordon R Williams Corporation

• Governair Corp.

• Heat Controller, Inc.

• Heil Heating & Cooling Products

• Hepair

• Ice-Cap, Inc.

• International Comfort Product

• Joseph Davis

• Koldwave

• Lennox Industries Ltd.

• Ludell Mfg. Co.

• Luwa Bahnson Inc.

• Mammoth, Inc.

• Marvair

• McQuay International

• Miller-Picking

• Mitsubishi Electric

• Mueller: Paul Mueller Co.

• NYLE Dry Kiln Systems

• Nordic Air

• Nordyne

• Pomona Air Guns

• Portatemp U.S.A.

• Powercold Corporation

• RSI Co.

• Recreonics, Inc.

• Robur Corp.

• Sanyo Air Conditioning Product

• The Whalen Company

• Tom Brown Contracting, Inc.

• Trane Co.

• Trane Company

• Trent Technologies

• Trevor-Martin Corp

• Unico, Inc.

• Vilter Mfg. Corp.

• Water Furnace International

• Waterfurnace

• Wine Enthusiast

• York International Corp.