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for excellent heating, air conditioning and
electrical services in Coeur D'Alene, ID

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How Does a Gas Furnace Work?

One of the most popular and common types of heating systems is the furnace. If you use a gas furnace for your heating, you are in good company: approximately 60% of homes have a gas furnace heating system. Understanding how your system works is important, so our ACI Northwest technicians have taken some time to explain below how your gas furnace brings warm air into your home.

How Does a Gas Furnace Work?

In a gas furnace, air is heated and blown into your home through ductwork. The process starts with ignition: the thermostat senses that the temperature in your home has dropped and cues the furnace to begin the ignition cycle. A component called the draft fan inducer motor draws air into the burner assembly; the burners are ignited and the heat from the burners warms the heat exchanger. The air from inside the burner assembly is exhausted to the outside while a second fan, known as the blower fan, turns on. The blower fan is attached to the return duct, and as such, brings in the return air from your living spaces and blows it over the hot heat exchanger. This blown air is warmed, and continues its way into the supply ducts where it is delivered, warmed up, back into your living spaces. This process continues until the set temperature has been achieved.

What Are the Benefits of a Gas Furnace?

Here are some benefits of gas furnaces worth considering:

  • Convenience – natural gas is piped into homes, eliminating the management of deliveries.
  • Clean burning – natural gas burns cleanly, unlike other fossil fuels.
  • Gas heat is very warm – the heat given off by gas-fueled heating systems is anywhere between 25 and 35 degrees warmer than other systems. This means your home will heat up quickly.
  • Good energy efficiency – the average gas furnace has an efficiency rating of 90% , and can go as high as 98%.

If you have questions about your gas furnace heating system, or need repair, call ACI Northwest today and schedule heating service in Coeur d’Alene with one of our HVAC experts.

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