Addison Products Co. Air Enterprises Inc.

Air Seal Filter Housing, Inc. AIRMAX, Inc.

AllStyle Coil Co., Inc. American Air Filter

American Standard Air Conditioning Applied Air Systems, Inc.

APT Inds., Inc. Arcoaire

Ares Aston Industries Inc

Aztec Sensible Cooling, Inc. Berner International Corporation

Bohn Refrigeration Products Buffalo Air Handling Co.

Carrier Corp. CES Group, Inc.

CLEANPAK Intl. Clearline Environmental Products

Coil Co. Comfortmaker

Dunham-Bush, Inc. Energy Labs, Inc.

Energy Savings Products Ltd Enerzone Inc

Environmental Technologies First Co.

Frigid Coil Goettl Air Conditioning, Inc.

Goodman Manufacturing Co., LP Governair

Haakon Inds. Hastings HVAC, Inc.

Heat Controller Inc. Heat Transfer Specialties

ICP Industrial Acoustics Co.

Industrial Sheet Metal & Mechanical Corp International Environmental Corp.

Jackson & Church Janitrol Air Conditioning & Heating

KeepRite Kees, Inc.

Leader Fan Industries Ltd Lennox Inds.

Longley Electric Co Ltd Luxaire

Magic Aire Marlo Coil

McQuay Intl. Microzone Corp

Munters Corporation National Comfort Products

Niagara Blower Co. Nordic Air, Inc.

Pace-York Intl. Phoenix Air Systems LLC

Racan Carrier Co. Rheem Air Conditioning

Russell Ruud Air Conditioning

Seasons 4 SEMCO Inc.

Sterling Heating Equipment Temtrol

Thermal Corp. Titus

Trane Trane Atlantic

Typhoon/RSI Air Conditioning USA Coil & Air

Valutech Inc. WEBCO, Inc.

Witt York International

York Intl. Corp.