What's up all? New guy here with a question.
I bought a used Heil furnace from my wife's uncle in '01, and it didn't come with any information. All he could tell me was it was used for 2 years. I don't see any manufacturer's date anywhere on this thing. I have the model number and have been searching the web for a while trying to pin down the actual age. Anybody know how old this thing is? Or where I can get more info? This is the model number: NUGD100AGO1