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Considerations
During the heating season, the heat pump circulates a larger volume of lower temperature air than most people are accustomed to. A heat pump delivers air in the 90° - 100° F (32° - 38° C) range. The outlet temperature of a warm air furnace, however, is in the 120° - 140° F (49° - 60° C) range. So while heat pump supply temperatures may seem and feel too low, a properly designed heat pump system will actually keep the house air temperatures at acceptable levels - and at a lower cots then all-electric heating systems. Heat pump systems, however, are only economical at moderately cold temperatures. To handle very low temperature conditions most heat pump systems utilize electric resistance strip heating to supply supplemental heat.
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