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energy efficiency ratio: Meaning and Definition of
en'ergy effi"ciency ra"tio
Pronunciation: [key]
- a measure of the efficiency of a heating or cooling system, as a heat pump or air conditioner, equal to the ratio of the output in B.T.U./hour to the input in watts:EER A high-efficiency home window air conditioner has an energy efficiency ratio of 7.5 or more. Abbr.:
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