Resources:
Furnace Brands
- Adams
- Aire-Flo
- Amana
- American Standard
- Arcoaire
- Armstrong
- Bard
- Bryant
- Carrier
- Centurion
- Clare
- Coleman
- Comfort-Aire
- Comfortmaker
- Columbia
- Day & Night
- Dayton
- Dornback
- Ducane
- DMO Industries
- Evcon
- Fedders
- Fraser Johnston
- Gibson
- Goodman
- Hallmark
- Heat Controller
- Heil
- Homart
- ICP Commercial
- Intertherm
- Janitrol
- Keeprite
- Kenmore
- Kerr
- Lennox
- Luxaire
- Maytag
- Newmac
- Nordyne
- Olsen
- Oneida Royal
- Payne
- Rheem
- Ruud
- Sears
- Spartan
- Tappan
- Tempstar
- Texas Furnace
- Thermo-Pride
- Trane
- Weatherking
- Weil Mclain
- Westinghouse
- Williamson Thermaflo
- York
