British thermal unit

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BTU is the British thermal unit. It is a measure of energy used to produce heat. The measure is widely used in the UK, USA and Canada. It is used for such purposes as natural gas pricing.

1 pound of water 59F ---- 60F 0.4536 Kg water 15C ----- 15.6 C

1BTU = 1055.5952 J 1Kwh=3400BTU