Q:

How efficient are mini AC units?

A:

Quick Answer

As of 2015, the Department of Energy certifies 22 models of air conditioners with outputs less than 6,000 Btus as energy-efficient appliances through its Energy Star program. These units must have a minimum energy efficiency ratio of 10.0 or better to qualify for Energy Star certification.

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Full Answer

Most mini air conditioner units have an output of approximately 5,000 Btus, sufficient for cooling rooms of 150 square feet in area or less, though no industry-wide definition of which units qualify as mini air conditioners exists. Energy-efficient mini air conditioners are estimated to use 15 percent less energy than air conditioners that do not have Energy Star certification.

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