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How Heating Systems Work

A furnace works to keep a home warm in the winter, and also plays a critical part in the operation of an air conditioning system.


Furnaces produce heat through the combustion of natural gas in the furnace’s burner. The heat produced from this process then passes through a heat exchanger. Air from your home’s return air ducts is blown over the heat exchanger, thus warming the air.


The furnace’s blower then blows the warmed air into the duct-work, which carries and disperses the warmed air throughout the home.


During warmer months, the blower inside a furnace continues to circulate return air throughout the home–only this time, the return air has been cooled by being blown over the indoor coil portion of the home’s split-system air conditioning system. The condensing coil can be installed either on the top or bottom of your furnace, depending on your ductwork airflow.

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