Hi. I have had several people out to give me quotes on a new high efficiency two stage furnace for my home and so far I've heard that I need 58,000 btu's, 76,000 btu's, 80,000 btu's and 90,000 btu's. Needless to say I'm a tad bit confused at this point especially since I've read that it's not good to have too many or too few btu's.....hmmmm, that "too few btu" has a nice rhyme to it....might make a nice poem for that special HVAC man. Anyways, my home is 1200 sq ft and I currently have a 20 year old 100,000 btu furnace and I live in the mid-west. I'm considering throwing out the high and low btu's quotes and then averaging the 76,000 and 80,000 ones and trying to find someone that offers a 78,000 btu furnace but something tells me there's got to be a better way. Anybody have any ideas? Thanks. Befuddled, bemused and just plain COLD in Illinois