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Old 06-02-2010, 08:34 PM   #15 (permalink)
RobertSmalls
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Coefficient of Performance. It's the amount of heat energy moved from the A/C's cold side to its hot side, divided by the amount of electrical energy required to do it.

An EER is the same figure, but with one of the terms in BTU/hr and the other in Watts, and the units carelessly lopped off before doing the division. EER = COP * 3.413.
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