| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Heating seasonal performance factor | Energy | A representation of the total heating output of a central air-conditioning heat pump in BTUs during its normal usage period for heating, divided by the total electrical energy input in watt-hours during the same period, as determined using the test procedure specified in the California Code of Regulations, Title 20, Section 1603(c). (references) | |
| Heating seasonal performance factor (HSPF) | Energy | 1: The measure of seasonal or annual efficiency of a heat pump operating in the heating mode. It takes into account the variations in temperature that can occur within a season and is the average number of Btu of heat delivered for every watt-hour of electricity used by the heat pump over a heating season. (references) | |
| 2: The total heating output of a heat pump during its normal annual usage period for heating, in Btu, divided by the total electric energy input during the same period, in watt hours, as determined by DOE 10 CFR Part 430, Subpart B, Test Procedures, and based on Region 4. Heat pump heating is expressed in terms of HSPF. New equipment ranges from about 6.8 to 10.0 HSPF. Higher HSPF ratings indicate more efficient equipment. (references) | |||
Source: compiled by the editor from various references; see credits. | Top | ||
