Heat pumps save energy because transferring heat is easier than making it.
Dual fuel furnace wiring.
Dual is better than one.
Heating with a dual fuel heat pump.
As long as outdoor temperatures remain above the.
The common c wire doesn t control heating or cooling.
The electric heat pump and a gas furnace.
The dual fuel set up.
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.
A dual fuel system may come in the form of a packaged unit or a split system with two energy sources.
Natural gas is more efficient for bigger heating loads so the dual fuel system uses gas when temperatures get really low.
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.
A dual fuel furnace takes on the problem with a hybrid approach that combines a heat pump and a backup gas fired heater.
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.
The furnace kicks in for only the coldest months.
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.