Heat Requirements of an “Average” Home

Heat Requirements of an “Average” Home

Chart Average

    More heat is needed in the following circumstances:
  • The heater will handle the January peak loads without backup heat.
  • The insulation is inferior (check existing building codes in your area).
  • There are very tall or cathedral ceilings.
  • High altitude and/or strong wind exposure.
  • The heater is not freestanding or is not installed in a central location.
  • The cold is “wet” rather than “dry,” as in proximity to an ocean or the Great Lakes.

The following chart correlates thermal mass and fuel load:

Thermal Mass and Fuel Load

Chart Thermal Mass

  1. Average value; core is hotter, skin is cooler (300 x 0.23)
  2. The bottom layer and benches are not sufficiently warm to count as thermal mass. Storage time: 21 hours; firing time: 3 hours.
  3. Net energy yield of one pound 20% residual moisture cordwood combusted with 90% efficiency.

SI Equivalent Conversion Factors: 1 KW = 3,412 BTU 1m² = 10.76 sq. ft. 1 lb. = 0.453 kg