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BTU Calculator

Use our calculator to find out an approximate BTU value for your room.

When updating your home with new radiators, it can be tricky to navigate the various requirements. Calculating your radiator output is one of the figures you will need.

The British Thermal Unit (BTU) is the amount of energy needed to heat a single pound of water by 1°F. 1 BTU is equivalent to 1055 joules. This measurement will tell you how hot your radiators need to be to accommodate your property.


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