🔥 Heating Load Calculator
How many kW does your boiler need? Area + building type + ceiling height → estimate in seconds.
Estimated heat load
– kW
📌 Heating rules of thumb
- Rule: 100 W per m² in a standard house
- Old ×1.5 — passive ÷2
- Radiator size = room × W/m²
- +20% reserve for cold corners never hurts
⚠️ Estimate only. Exact heat load is calculated by a professional per DIN EN 12831.