• EnergyCraft Systems

• Entech Sales & Service

• Enviromaster International

• Environmental Group

• Environmental Technologies

• Evcon Industries (York International Corp.)

• Facilitec Corporation

• Fan America Inc.

• Fedders Corporation

• Fedders Corporation

• Filtration & Media Group Inc.

• First Co.

• Flanders Corporation

• Floratech Industries

• Flow Control Industries Inc.

• Friedrich Air Conditioning Co.

• Fujitsu General America

• Gaylord Industries, Inc.

• General Resource Corp.

• Geoflex Systems

• Gillies Lumber

• GoGaS Goch GmbH & CO.

• Goltz & Goltz Service, Inc.

• Gordon R Williams Corporation

• Gordon-Piatt Energy Group

• Governair Corp.