When did they stop making the Everest II? The 8012 model was a direct replacement for the model you should have (whether your trailer's an 89 or 90). I was looking just last year and they still sold
them...But I sure can't find one now.
I wanted to replace mine, but didn't want to spend almost $800, and I had the same dilemma as Tom. A cheaper Suburban furnace
would require cabinet modifications, cutting a new hole in the fiberglass shell and sealing the old one. This
is the direct replacement, and I'm not sure why they stopped making it, if that's true.
In the end I did a minor refurbish of my furnace, which I linked in your other thread. For now, it's running great. Not sure what I'll do if I hold onto the trailer long enough to need a new one.