Just clocked my furnace over the past 6 hours. 4500 sq. ft. Stone faced ICF house, lots of south facing glass. Nicely sheltered from northwest winds.
Todays conditions: 60 km/h WNW wind, 10 F. Cloudy. Snow and blowing snow.
BTU required to keep house at 70.5F is 20.2 kbtu per hour.
How's this compare with other calculated or measured values that people have ? Just curious how my house stacks up against conventional (or other designs) on this coldest day of the winter.