Building Heat Loss Calculator
Wall area
Wall U-value
Roof area
Roof U-value
Floor area
Floor U-value
Window and door area
Window U-value
Ventilation heat loss (W/K)
Design temperature difference (K)
Heating degree days per year
Heat loss coefficient
352.0 W/K
Peak heating load
8.1 kW
Annual heat demand
21,120 kWh
Of which the building fabric
302.0 W/K
Calculator by
Building heat loss
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