We are getting a new furnace, Trane XV95, and our contractor estimated we need 66,500 BTUs, which means we need the 80K BTU furnace. I was disappointed that we weren't able to qualify for the 60K furnace, as we spent a lot of money this summer getting our home insulation improved. My question is, what can we do to reduce our BTU requirements so we only need the smaller furnace? Our house is only 1450 square feet, in upstate NY.
1) do the calculations take into account the temp we keep our house? We generally keep the thermostat at 67, and only turn it up to 69 if grandmother is visiting.
2) How specific are the calculations? For example, we didn't have our ducts sealed, or the crawl space walls insulated. Would doing that bring down our BTU needs?
Any other things we can do to bring down the BTUs? Thanks.