Energy efficiency rating
Energy efficiency rating means the following product-specific energy usage descriptors: Annual fuel utilization efficiency (AFUE) for furnaces; combined energy efficiency ratio (CEER) for room and portable air conditioners; seasonal energy efficiency ratio 2 (SEER2) for the cooling function of central air conditioners and heat pumps; heating seasonal performance factor 2 (HSPF2) for the heating function of heat pumps; airflow efficiency for ceiling fans; and, thermal efficiency (TE) for pool heaters, as these descriptors are determined in accordance with tests prescribed under section 323 of the Act (42 U.S.C. 6293). These product-specific energy usage descriptors shall be used in satisfying all the requirements of this part.