Definition: British thermal unit

From Open Energy Information

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British thermal unit

The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit; often used as a unit of measure for the energy content of fuels.[1][2]

Wikipedia Definition


Also Known As
Btu
Related Terms
Energyheat
References
  1. http://www.eia.gov/tools/glossary/index.cfm?id=B
  2. http://needtoknow.nas.edu/energy/glossary/