BTU and chimney liner ?

[mchoney]

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

[BaldLoonie]

1200 sq ft ain't much home though mine is smaller. How new? How well insulated? How are the windoze? My 1000 sq ft home is tight. I have an 80K 2 stage 80% which is 48,000 BTU input on low. I can heat the home just fine with high locked out even below zero. Only bought that big furnace because this model wasn't available smaller at the time. Demand to see a heat loss calculation to show just how much furnace you need. Seems that small homes are most commonly oversized, dealers are scared to use small furnaces.

[t527ed]

really need an accurate heat load done check all their input facts. my last house was 1100 sqare ft in nj 40,000btu pulse could cook me out all winter long.

[cem-bsee]

only use the OUTPUT of the HVAC unit.

run your own load calculation from this site! you can read a measuring tape? look beside an electrical box to determine how much insulation in walls.