• A.O. Smith Corporation

• A.O. Smith Corporation

• AC&C Painting and Plastering, Inc.

• American Water Heater Co.

• Amtrol

• Associated Tube Industries Ltd.

• BRK Electronics

• Bock Water Heaters

• Came (America) LLC

• Colmac Coil Mfg. Inc.

• Controlled Energy Corp.

• Davis Energy Systems

• Dragon Concrete

• EEMAX

• Heat Transfer Systems, Inc.

• HeatFlo Systems, Inc.

• Hubbard Enterprises

• Hubbell Electric Heater Co.

• J.L. Turner Co.

• Joseph Davis

• Keltech Inc.

• Leer Electric Inc.

• Lochinvar Corp.

• Marvair

• Maxi-Therm

• Murdock, Inc.

• PVI Industries

• Precision Boilers

• Radco Products, Inc.

• Rampart Hydro Services

• RenewABILITY Energy Inc.

• Rheem/Ruud Water Heater Div.

• Solar Development

• Spacemaker

• Specialty Forest Products, Inc.

• Stiebel Eltron

• SunQest

• Therma-Flow/Everhot

• Thermal Conversion Corp.

• Trevor-Martin Corp

• Warren Electric Corpration

• Weil-McLain

• Woodbrier Associates, Inc.

• Wyatt: R. B. Wyatt Mfg. Co.