How Do Gas Furnaces Work?
• A gas furnace works to keep a home warm during the winter heating season however the furnace’s centrifugal fan, commonly referred to as a blower also plays a critical role in the operation of the summer air conditioning system. In dual-fuel systems an indoor heat pump evaporator is installed in tandem with a gas furnace. • Furnaces produce heat through the combustion of natural or LP gas in the furnace’s burner. Heat produced from this process passes through a heat exchanger. Air from the home’s return ductwork is blown over the heat exchanger, thus warming the air. The furnace’s blower then propels the warmed air into the supply ductwork, which distributes the warmed air throughout the home. • During hot summer months, the blower inside a furnace is used to circulate “conditioned” air throughout the home–only this time, the air from the return ducts is cooled by being blown across an indoor evaporator coil of the home’s split-system central air conditioning equipment. This evaporat
