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Coefficient of Performance

By Bob Formisano, About.com

Definition:
Coefficient of Performance is the efficiency ratio of the amount of heating or cooling provided by a heating or cooling unit to the energy consumed by the system. The higher the Coefficient of Performance the more efficient the system. Electrical heating for example has a Coefficient of Performance of 1.0

A related term is AFUE for gas furnaces.

Also Known As: COP

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