Free tools

Heating calculators

HeatAlgo's free calculators give a quick estimate based on averaged coefficients - useful for a first conversation with a client. Full calculations live in the app.

Heat loss calculator

Enter heated area, building type, insulation standard and climate zone. Get the estimated building heat demand in kW with a ±10% uncertainty band.

Result in seconds · No registration

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Heat pump sizing calculator

The same 4 building inputs - the result is a recommended heat-pump power range in kW. Preliminary sizing, not a substitute for a design project.

Result in seconds · No registration

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Need the full calculation, not just an estimate

The HeatAlgo app calculates per PN-EN 12831-1, layer by layer. Create an account - 14 days free, no card.

Try free for 14 days