Radiator BTU Calculator
Estimate an indicative radiator output target in watts and BTU/h from room dimensions, broad construction presets, glazing, exposed surfaces and ventilation.
Typical use: Early-stage radiator sizing checks and room heat-output comparisons before a full heat-loss calculation
The interactive Get Your Project Right calculator loads on this page. Assumptions and product-specific values should be checked against the chosen manufacturer or supplier where applicable.