Energy efficiency ratio (EER) - How To Discuss
Olivia Zamora
Published May 04, 2026
Energy efficiency ratio (EER),
Definition of Energy efficiency ratio (EER):
Measure of the relative (and not overall) efficiency of a cooling or heating appliance or equipment, expressed as the ratio of output, (in British thermal units or Btus) per hour to the energy consumed (in watts). See also coefficient of performance (COP) and energy factor (EF).
Meaning of Energy efficiency ratio (EER) & Energy efficiency ratio (EER) Definition