Hello all, first post here and need a little help. I had an old Interdyne(?) 55/45 furnace that has the recalled gas valve burn up on me. I was lucky to have it not burn down my home, so, now that I still have my home, I need to fix it. I looked for a gas valve and they are around $200, give or take. When I opened my big oval portal door to the furnace, I could see the heat chamber/exchanger cracking in the corners leading to the inner portion of the back wall. There was one on each side about 4” long. I knew this back a year ago, but, being a double walled unit, I figured it was good for a little while. I decided to trash that unit completely and got me a Bryant 312AAV03070 (I believe it is). I am using this as a downflow and the unit sits on top of my old evaporator almost perfect, but, I am concerned as to how far the bottom of the furnace needs to be from the AC coil. It looks as if it is the same distance as the old unit (about 5-8” give or take) but the old unit was put in 1972 and this is a new 70k unit, MUCH hotter I am sure.
I have looked everywhere but can not find a “heat exchanger to AC coil distance” notes. I have looked EVERYWHERE and its getting real cold outside. Will this be enough distance or do I need some kind of transition duct work to raise the furnace?