Heat loss calculator in Btu/h.
A quick estimate of your house's heat loss - no sign-up.
Estimated heat loss
~41,844 Btu/h
±10% uncertainty range: 37,659 - 46,028 Btu/h
34.9 Btu/h·ft², typical for: Built in the 1990s or 2000s, no energy retrofit
14 °Foutside
- 10,000+m² calculated
- 600+accounts
- 2,000+radiant floor zones
- 100+installers
A simple heat loss calculator: how it works
Areaload per ft² by insulationclimatebuilding typeBtu/h
Averaged coefficients, not building elements: an estimate within ±10%, not room by room.
Every room on its own, in the app.
Walls, windows and thermal bridges calculated to EN 12831-1, room by room.
See the room-by-room heat loss →