As long as the temperature is above 35 degrees f or so a heat pump can pull heat from the outside air for less than it costs to fire up the furnace.
Dual fuel furnace wiring.
A dual fuel system may come in the form of a packaged unit or a split system with two energy sources.
Dual fuel technology combines the cooling and heating performance that you get from a heat pump with the consistent heating capacity of a gas furnace.
Natural gas is more efficient for bigger heating loads so the dual fuel system uses gas when temperatures get really low.
The furnace kicks in for only the coldest months.
Dual is better than one.
The dual fuel set up.
Heating with a dual fuel heat pump.
If it were always that simple you d be all in for dual fuel no matter what.
The electric heat pump and a gas furnace.
About the c wire.
Since a heat pump is more efficient than a gas furnace at higher temperatures the dual fuel system defaults to a heat pump on milder days.
What makes this system so.
A dual fuel furnace takes on the problem with a hybrid approach that combines a heat pump and a backup gas fired heater.
Dual fuel systems heat pump with furnace dual transformer systems systems that have more than one r wire whole home humidifiers and dehumidifiers compatible with nest learning thermostat only.
2 nest thermostat can only support one of these systems at a time.