The ratio of thermal power moved to electrical power input is more properly called "coefficient of performance" rather than "efficiency", but it's far greater t

The ratio of thermal power moved to electrical power input is more properly called "coefficient of performance" rather than "efficiency", but it's far greater than 100% in modern equipment. > From 1990 to 2013, U.S. shipment-weighted efficiency for residential split-system A/Cs increased from 9.5 SEER (~2.2 COP) to 14.9 SEER (~3.8 COP). https://www.energy.gov/sites/prod/files/2016/07/f33/The%20Future%20of%20AC%20Report%20-%20Full%20Report_0.pdf https://www.energy.gov/sites/prod/files/2016/07/f33/The%20Fu...