Definition of energy efficiency ratio in English:

energy efficiency ratio

Syllabification: en·er·gy ef·fi·cien·cy ra·ti·o
(abbreviation: EER)

noun

The ratio of a heating or cooling system’s output, per hour, in British thermal units to the input in watts, used to measure the system’s efficiency.
More example sentences
  • The Energy Efficient Ratio (EER) rating measures the air conditioner's efficiency during the hottest days of the summer.

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