Heat pump
A year’s space-heat demand from floor area and a rough insulation class, then electricity at a chosen SCOP versus gas.
Open a calculatorCooling load
Watts = area × W/m². BTU/h = watts × 3.412. A shaded room might sit near 80–100 W/m²; a west glass wall can want more. Not a heat-gain survey.
Area to cool — usually the room's floor footprint.
Area to cool — usually the room's floor footprint.m²
Cooling watts per square metre — a shaded room is often 80–100 W/m²; a west-facing window needs more.
Cooling watts per square metre — a shaded room is often 80–100 W/m²; a west-facing window needs more.W/m²
Cooling load
4,800 W
BTU per hour
16,378 BTU/h
Cooling load: 4,800 W
Kitchen heat, occupancy and solar gain move the number. The heat-pump page is the winter cousin.
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An educational estimate. Not medical, tax or credit advice.