If this project uses supplemental electric heat (electric resistance units/baseboards, existing heat pumps and/or ETS) in rooms other than bathrooms, the project is eligible for a whole home rebate only if the supplemental electric heat provides no more than 10% of the home's total heat load.
Auxiliary electric resistance strips built into the heat pump itself or non-electric heating systems are allowed for emergency use but not supplemental heat in whole home heat pump projects. Emergencies are heat pump maintenance/repair downtime or if the heat pump is unable to heat the home during an extreme weather event.