Amana
 
American Water Heater
 
Armstrong Air
 
Carrier
 
Clare
 
Coleman
 
Comfort Zone
 
Detroit Radiant
 
DMO Ind. / Olsen
 
Dornback
 
Ducane
 
Estate
 
Evcon
 
Frigidaire
 
Gemline
 
General Electric
 
Giant Factories
 
Glowcore
 
Goodman
 
GSW
 
HB Smith
 
Hupp Ind.
 
Lochinvar
 
Metzger
 
Nordyne
 
Norge
 
Norton
 
Pentair
 
Perfection Schwank
 
Raypak
 
Rheem
 
Roberts Gordon
 
Robertshaw / Uni-Line
 
Roper
 
Shenandoah
 
Snyder General
 
Speed Queen
 
Trane
 
Trianco
 
Uni-Line / Robertshaw
 
Viessman
 
Waterpik/Teledyne Laars
 
Weil McLain
 
White Rodgers
 
Williamson
 
York