So, this would work in place of the ancient 50% efficient at best unit in my basement at present?? How many BTU would you figure for a <2000 square house?
I based my calculations off several factors:
1. What a heating contractor recommended.
2. The current unit.
I have a unit I estimate at 60%, and has an input heat of 140k btu's.
So, effectively, my house was getting 84k btu's.
These furnaces are 80%. 84000/ 0.80 = 105kbtus. I selected the 110k unit.
Also, what part of the country do you live in?