Following others advice on here I downloaded a program and did a heat loss calculation. I used the slant fin software. Put in all of the data to the best of my knowledge. My home is a 1950 sq ft main floor, with an 1885 sq ft basement with poured walls, built in 2003 living in Central PA. I used the average temp we had this year in January which was 28 degrees and I got a heat loss of 52,989 an hour. My question is does this seem right? I also calculated the fuel I used in January to February, 200 gallons in 36 days, and from that using 139,000 BTU's per gallon found that I used 32,175 an hour. I know some days were colder than others but is my figuring correct. And also if this is my heat loss how do I apply this to boilers I am looking at?