Should I run my water heater in air source heat pump mode during the heating season?
My husband and I live in Minnesota (Zone 4) and have a small SIP house heated primarily with a Fujitsu Mini Split. Our water heater is a GE Geospring air source heat pump water heater.
I was wondering whether it is most efficient to run the hot water during the Winter months as a straight electric resistance heater, or to continue to running it in heat pump mode.
The water heater is in our main space (kitchen utility room, open to the kitchen) and does cool down the space considerably when run in heat pump mode, so the Fujitsu mini-split has to run to reheat the space, vs if it is run in pure electric resistance mode we don’t have building heat loss.
What are your thoughts on which method is actually more efficient?
We have been doing primitive heat recovering whenever someone takes a bath by letting the bath water cool before draining it away, but I’m curious if there is an answer to which mode is actually most efficient to use this time of year.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part