energy efficiency ratio
noun
often capitalized both Es&R
: a number expressing the relative efficiency of an appliance (such as a room airconditioner) that is obtained by dividing the unit's output in BTUs per hour by its energy requirement in watts
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“Energy efficiency ratio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/energy%20efficiency%20ratio. Accessed 22 Nov. 2024.
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