About this calculator

Underfloor heating demand for a well-insulated EU home is ~30 W/m² at design temperature. Heating season ~5000 h/yr at Reykjavík; COP for ground-source heat pumps ≈ 4.0, so electric draw is ¼ of heat output.

Frequently asked questions

What does the Geothermal Underfloor Heating Demand do?

Annual kWh demand for geothermal underfloor heating in Iceland / Nordic climates. Underfloor heating demand for a well-insulated EU home is ~30 W/m² at design temperature. Heating season ~5000 h/yr at Reykjavík; COP for ground-source heat pumps ≈ 4.0, so electric draw is ¼ of heat output.

Is the Geothermal Underfloor Heating Demand free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Geothermal Underfloor Heating Demand?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified geothermal heating professional before committing to a purchase or a job.

What inputs does the Geothermal Underfloor Heating Demand need?

Enter values for: Heated floor area (m²), Heat-pump COP. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Geothermal Underfloor Heating Demand on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.