DimlyLit
Member
- Location
- Seattle, WA
- Occupation
- Electrician 4y
Are a heat pump and a supplemental electric resistance heat source non-coincedent loads for an HVAC installation? Does the heat pump remain on at low temperatures where it is not efficient when it calls for heat from the supplemental resistance coil source, or does it shut off and allow the supplemental heat to be the full supply until the temperature rises for the heat pump to kick back in? I am wondering as I am sizing a feeder to the two units, controlled off the same stat and wonder if I can just calculate the larger load at 125% rather than both loads.