what is eer rating
Relationship of SEER to EER and COP[edit] The Energy Efficiency Ratio (EER) of a particular cooling device is the ratio of output cooling energy (in BTU) to input electrical energy (in Wh) at a given operating point. EER is generally calculated using a 95 Â°F outside temp and an inside (actually return air) temp of 80 Â°F and 50% relative humidity.