Air-conditioning cooling load
Estimate required air-conditioner cooling capacity in watts and BTU/h from room floor area and thermal load per m².
Open calculatorHeat pump vs gas boiler
Annual heat demand is heated floor area multiplied by the building’s specific heat load in kWh/(m²·year). Heat-pump electricity use equals total heat demand divided by your seasonal coefficient of performance (SCOP), while gas consumption divides the same heat demand by condensing boiler efficiency.
Heated indoor floor area in m² — exclude unheated garages, cellars and attics.
m²
Approximate annual space-heating demand per m² (planning estimate, not an official energy certificate).
Seasonal average COP over the heating season — typically 3.0 to 4.2 for air-source heat pumps (direct electric resistance is 1.0).
Price of gas energy per kWh (including variable distribution).
Seasonal boiler efficiency expressed as a decimal (e.g. 0.90 = 90%).
Annual heat-pump cost
3,086 zł
Annual heat demand
12,000 kWh
Heat-pump electricity used
3,429 kWh
Annual gas-boiler cost
4,667 zł
Annual difference (gas minus heat pump)
1,581 zł
The link may contain your inputs. Anyone receiving it can read them.
Models space heating only (for domestic hot water, use the dedicated Hot Water calculator). Real-world SCOP depends heavily on flow temperature (underfloor heating vs radiators).
Compare scenarios
Snapshot A stays only in this page’s memory. Refreshing or leaving the calculator removes it; it is not added to links or sent to the server. The percentage change uses the absolute value of A; it is not defined when A is zero.
Sensitivity analysis
These simulations change only the indicated parameter; all other assumptions match the form. They are not forecasts or confidence intervals. The initial variants are editable examples.
PLN/kWh
PLN/kWh
| Scenario | Electricity price per kWh (PLN/kWh) | Annual heat-pump cost (PLN/year) | Difference from baseline (PLN/year) |
|---|---|---|---|
| Baseline | 0.9 | 3,085.71 | 0 |
| Variant 1 | 0.72 | 2,468.57 | -617.14 |
| Variant 2 | 1.08 | 3,702.86 | 617.14 |
Blank, invalid or unavailable results are shown as a dash.
Recent on this calculator
Full historyStored strictly in this browser’s local storage. Clicking an entry reloads the parameters into the calculator URL; sharing the link exposes those inputs to the recipient.
No saved calculations yet. Use any calculator and your recent results will appear here.
Educational estimate only. Not medical, tax, legal or financial advice.