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BTU Calculator

The BTU (British Thermal Unit) calculator can be used to work out how much radiator power you need.  Numerous factors can affect this, such as types of window and room dimensions.

Heat Output (BTU) Calculator

Use this calculator to determine the required heat output to heat your room.

A BTU (British Thermal Unit) is a unit of measurement of heat per hour. The BTU calculator will determine the size and quantitry of radiators needed per room.

Room Type

Room Dimension


BTU's Required:

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