The furnace acts as backup to the heat pump when outside temperatures drop below freezing making dual fuel heat pumps less expensive to operate in colder climates than all electric models.
Heat pump with gas furnace backup.
This wire will also run to the air handler furnace and the condenser.
The defrost control board in the condenser will automatically defrost the system.
Eliminating the heat pump entirely and installing a forced air furnace is an option though it is expensive and will require a large amount of work.
A dual fuel furnace takes on the problem with a hybrid approach that combines a heat pump and a backup gas fired heater.
To deliver the highest system efficiency performance and climate control an indoor cooling coil must be matched in size and rated with your heat pump.
Also called add on or hybrid dual fuel heat pumps are designed specifically to work as a single system with a natural gas propane or oil fired furnace.
The best of both worlds a dual fuel heat pump system will provide you with the most energy efficient home heating and cooling system by pairing an electric heat pump with a traditional gas furnace.
In a heat pump this is for the backup heat source.
Whether it is electric heat strips or a gas furnace dual fuel the w terminal controls this.
Get huge savings on your monthly energy costs with a dual fuel heat pump furnace system.
Dual fuel heat pump furnace systems.
Some air source heat pumps are backed up by a natural gas furnace which is a bit trickier to compare with regular heat pump operating costs since the current cost of natural gas is relatively low if your heat pump can keep your home warm down to say 30 degrees f but your balance point is set to switch over to backup heat at 40 degrees.
Installing a gas furnace.
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.
What makes this system so precise and energy efficient for heating is that it seamlessly alternates between the two energy sources for heating comfort depending on your specific outdoor conditions.
When the temperature drops below freezing there s not enough heat in the air to sufficiently heat the home with the pump alone so the backup electric or gas furnace kicks in to provide warmth.
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