This ratio is expressed in Btu/Watt-hour.Ĭ Heating Seasonal Performance Factor (HSPF) is the total space heating required in U.S. Electrically Operated Unitary Heat Pumps: Minimum Efficiency Requirementsġ5.0 SEER a 12.5 EER b 8.5 HSPF c (single phase) 14.0 SEER (three phase d)ġ5.0 SEER 12.0 EER 8.2 HSPF (single phase) 14.0 SEER (three phase d)ġ1.8 EER 12.8 IEER e 3.4 COP f at 47 ✯Ī Seasonal Energy Efficiency Ratio (SEER) is the total heat removed from the conditioned space during the annual cooling season, expressed in British thermal units (Btu), divided by the total electrical energy consumed by the air conditioner or heat pump during the same season, expressed in Watt-hours.ī Energy Efficiency Ratio (EER) is the ratio of the average rate of space cooling delivered to the average rate of electrical energy consumed by the air conditioner or heat pump. These ASHRAE 90.1 equipment types are excluded: through-the-wall, air cooled small-duct high velocity, air cooled air conditioners, water cooled air conditioners, evaporatively cooled condensing units, air cooled condensing units, water cooled and condensing units, evaporatively cooled. The table below includes minimum efficiency requirements for the following ENERGY STAR-qualified covered product categories: air-source heat pumps (residential) and geothermal heat pumps (residential).
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