Heat Loss Calculator

Calculate your space's heat loss and find the perfect boiler for your needs

General Settings

Desired indoor temperature
Coldest expected outdoor temperature
Typical winter wind speed

Common Design Temperatures by Region:

  • Northern US (MN, ND, ME): -20°F to -10°F
  • Upper Midwest (WI, MI, NY): -10°F to 0°F
  • Mid-Atlantic (PA, OH, IN): 0°F to 10°F
  • Southern US (TX, GA, NC): 10°F to 25°F
  • Coastal/Mild (CA, FL, PNW): 25°F to 40°F

Rooms