// multi-utility computation suite · offline · instant · precise
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eng.heat-pump-cop-seasonal Calculator
Calculates seasonal COP (SCOP/HSPF) for heat pumps from full-load COP and part-load modulation characteristics over a heating season bin distribution. SCOP is more representative than rated COP because heat pumps operate at part load most of the time — variable speed units achieve SCOP of 3.5–5.0.
Inputs
Heating Degree Days
Reference formula or conversion factor shown for context.
Home Heat Load Btu Hr
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
Hspf
Reference formula or conversion factor shown for context.
Results
seasonal avg COP
Sample size or count used in the calculation.
est. annual heating energy (kWh)
The result expressed on a per-year basis.
vs resistance heat
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
savings vs resistance heat
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
HSPF
Reference formula or conversion factor shown for context.