EER Calculator

Calculate energy efficiency ratio.

British Thermal Units - measure of heat energy.
BTU/hr
Rate of energy transfer measured in watts (W).
W

Results

EER:
Calculated eer based on your inputs.
-BTU/W-hr
Efficiency Rating:
Calculated efficiency percentage.
-
Reference: ASHRAE/IIAR Standards. EER = BTU/hr ÷ Watts