A. O. Smith
American Standard Water Heaters
Ariston Holding
Bosch Thermotechnology
Bradford White Corporation
GE Appliances
Groupe Atlantic
Linuo Ritter International
Midea
Parker Boiler Company
Rinnai Corporation
Rheem Manufacturing
Stiebel Eltron
Viessmann
Watts
Whirlpool Corporation
Westinghouse Electric Corporation