This measure is the addition of a ductless heat pump (DHP) to an existing home with a central electric forced air furnace (EFAF). The DHP has a higher coefficient of performance (COP) than an EFAF and uses less electricity to provide the same amount of heat. Typically, the DHP is used to offset some or most of the heating load otherwise met by the EFAF. However, this measure specification does not include a control strategy, nor does it preclude homes with significant supplemental fuel use.
Savings and cost estimates are derived from the findings of recent evaluations of programs in the Northwest. An exception was made for DHPs in Zone 3, for details see the bottom of the page.