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How Does a Furnace Work?

posted by: Bart Manning

Knowing the basics of how a furnace works is key to understanding your home's heating and air conditioning needs.

As you evaluate your home's heating and air conditioning system, it is important to have a basic grasp of how your furnace works. The better you understand your furnace's operation, the more equipped you'll be to choose the right furnace for your home and properly maintain it.

The basic functioning of your furnace relies heavily on what powers it: gas or electricity. Keep reading to learn more about how both types of furnaces work.

How Do Gas Furnaces Work?

Gas furnaces have a programmed temperature setting. When the inside air temperature falls below that setting, the burner is lit inside the combustion chamber, creating warmth in the heat exchanger. This heated air blows into the plenum, a space that facilitates air circulation. Ductwork delivers heat throughout the home or building. Combustion gasses vent through the wall or a flue roof vent.

How Do Electric Furnaces Work?

Electric furnaces are similar to gas furnaces, but they replace gas burners with electric heating elements. These heating elements mainly consist of tight coils of wires. Mounted inside the furnace cabinet, these wires possess high resistivity and operate at 2,000 degrees Fahrenheit. Both electric and gas furnaces feature air drawn into cabinets via cold-air returns before flowing out through heat exchangers. In both gas and electric systems, ducts disperse heat throughout the home.

It takes a highly-trained professional to maintain a complicated furnace. To learn more about maintenance service for heating and air conditioning, as well as additional information on the furnaces available for your home, contact our team at Air Treatment, Inc. today.

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