Building heat
Heating load guide
Heating load is a quick estimate of how much power a room or building needs to stay warm on a cold day. Use this guide before you open the calculator or compare example cases.
The simplified sizing logic
Core relationship
Load = area × heat loss factor
A larger area or a higher loss factor both raise the heating requirement. The margin adds a small buffer.
Practical note
This is a planning estimate. A proper design can also account for ventilation, insulation, glazing, and climate data.
Useful in early project planning
Room planning
Estimate the load for a single room or zone before choosing emitters.
House sizing
Check the scale of a full house heating requirement in kW.
Comparison
Compare smaller and larger homes or renovation scenarios quickly.