Calculator
Heat pump sizing calculator
Recommended heat-pump power range from 4 basic building inputs.
Enter heated area, building type, insulation standard and climate zone. The calculator returns a recommended heat-pump power range in kW with a margin for DHW and reserve. This is preliminary sizing. Pick the power class and run full calculations in the HeatAlgo app.
Heat pump sizing calculator
Four basic building inputs and you see a recommended heat-pump power range. Preliminary estimate only, not a substitute for a design project.
How it works
Enter 4 basic building inputs: heated area, building type, insulation standard and climate zone.
The calculator estimates the building's heat loss using averaged coefficients, then sizes the pump with a 10-20% margin (incl. a DHW reserve).
You get a recommended pump power range in kW along with the basis of the estimate (building heat loss in kW).
For preliminary power-class sizing with radiator analysis, supply temperature variants and running cost comparison, use the HeatAlgo app. Choosing the specific device model stays with you.