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  1. #1
    Join Date
    Oct 2005


    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

  2. #2
    Join Date
    May 2000
    Indianapolis, IN, USA
    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.

  3. #3
    Join Date
    Mar 2005
    burlington county n.j.
    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.

  4. #4
    Join Date
    Feb 2003
    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.
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

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