E · Glossary
EER
Also known as energy efficiency ratio
EER is the ratio of cooling output to electrical input at stated rating conditions.
EER (energy efficiency ratio) divides cooling capacity by electrical input at specified test conditions. It is a point-condition cooling metric rather than a seasonal figure. A higher numerical result is comparable only where the definition, rating conditions and product configuration match. EER does not predict annual electricity use, describe heating performance or replace SEER, cooling-load work or exact product data.
Category
Air conditioning
Applies to
Heat pumps & AC
Last reviewed
28 Jul 2026