• 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.