| | Atwood Mobile Products (Rockford, IL) Water heaters & components for RV industries | |
| | Aubrey Manufacturing Inc (Union, IL) Manufactures ventilation systems, portable electric heaters, kitchen range hoods, bathroom & kitchens fans; bath cabinets | |
| | B P Products Inc (Willoughby, OH) Barbeque products, portable heaters, gas lights, propane accessories & repairing | |
| | Bananza Air Management Systems (Grand Rapids, MI) Gas fired space heaters | |
| | Bel Thermal Units Inc (Oakland Park, FL) Air conditioning system electric heaters & duct work | |
| | Belchfire Corp (Milwaukee, WI) Preheat torches for metal fabrication, foundry ladle heaters | |
| | Bock Water Heaters Inc (Madison, WI) Water heaters | |
| | Boiler Erection & Repair Co (Ambler, PA) Pipe & tube bends, boiler & heat exchange construction & repair, feedwater heaters & economizers | |
| | Bradford White Corp (Middleville, MI) Water heaters | |
| | Bradford White Corp (Ambler, PA) Water & radiant heaters | |
| | Bradshaw Manufacturing Inc (Cleveland, OH) Electrical tools, plastic pipe PVC heaters & tube cutting tools | |
| | Broan-Nutone LLC (Hartford, WI) Kitchen trash compactors, range hoods & exhaust fans; bathroom cabinets, electric heaters; door chimes; intercom & sound systems; built-in ironing centers; ceiling paddle & whole house fans; central v | |
| | Cleveland Process Corp (Homestead, FL) Immersion heaters, heating system controls, level controls & timers | |
| | DCM Manufacturing Inc (Cleveland, OH) Fractional HP direct current motors; heaters for military vehicles | |
| | Dekko Heating Technologies Inc (South Whitley, IN) Injection molded heaters | |
