Air-Source Heat Pump with Forced-Air Natural Gas Backup
I’m wondering if it is possible to run a forced air air-sourced heat pump, while keeping an existing (new) natural gas furnace for backup, that shares the same duct work.
I know this is easy if you have a heat pump with forced air and say baseboard on separate systems.
What would be needed besides a thermostat that could switch between the two systems? Speaking as a Minneapolis/St. Paul metro area resident, where if everyone went with air-sourced heat pumps, we’d probably take out the grid when the polar vortex hits.
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