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Furnace: How Does it Work?


A furnace can seem like a confusing piece of equipment to the average homeowner. Most people only know that it somehow produces heat and keeps their home warm. But have you ever wondered how it all works? It’s pretty simple actually. Read on to learn more.

Your furnace kicks into action when your thermostat tells it that the room or rooms temperature has dropped below the temperature it is set to hold at. The thermostat then sends a signal to the furnace which signals a valve to open and deliver gas to the burners and for the blower to to start blowing air. Once the burners light, the flames begin to heat the heat exchanger, a series of metal pipes, and then the blower blows air over these pipes which in turn, warms the air. The burned off gas from the flames that are fired into the heat exchanger tubes are sent out a flue to either your chimney or a vent on the side of the house via the inducer motor. Once the furnace has warmed the room back to the set temperature on the thermostat, the furnace turns off and the cycle eventually repeats itself.

Have you scheduled your annual maintenance? If not call us or schedule online here!

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