"Coefficient of Performance",is a measure of the efficiency of a heating or cooling system, defined as the ratio of useful heating or cooling output to the energy input required to achieve it.
Applicable units are those of quantitykind:CoefficientOfPerformance
https://en.wikipedia.org/wiki/Coefficient_of_performance#:~:text=The%20coefficient%20of%20performance%20or,and%20thus%20lower%20operating%20costs.
""Coefficient of Performance",is a measure of the efficiency of a heating or cooling system, defined as the ratio of useful heating or cooling output to the energy input required to achieve it.