Underfloor Heating Calculator
Estimate the underfloor heating output a room needs.
Heating output required
1,200W
- In kilowatts
- 1.2 kW
- In BTU
- 4,095 BTU/hr
Typical allowances are around 100 W/m² for a well-insulated room and 150 W/m² for a conservatory.
v1.0 · Reviewed September 2026