The 9 Vital Gas Furnace Parts

Do you have an idea what are the essential gas furnace parts? You’ll soon learn about the key furnace terminologies and various definitions that can enlighten you and help you better understand the various gas furnace parts and the way it works. Basically, your furnace has four types. You have gas, oil, dual fuel and electric. Even if there are different kinds of furnace, many heating systems, such as a gas furnace, work the same way. They have the same fundamental functions as well as mechanisms that deliver heat to your house.


Return Ducts: These ducts get the cooled air from inside your home and then take it back to your furnace so that it can go through the process once more to be heated up again and redistributed throughout your home.


Air Filter: When the furnace pulls air from the return ducts, its air filter is situated just before the blower motor to capture dust, any particles, and other debris in the air. It is there primarily for two reasons, firstly, it safeguards your furnace motor and then improve the quality of air in your home by getting rid of various allergens and pollutants.



Blower Motor: It is an electric motor that has a fan in position to evenly distribute a supply of air current into the furnace. It is a forced movement that forces the air to the heat exchanger (warms the air) and go to the supply plenum that supplies the warm air throughout your home.


Thermostat: This gauge measures your home’s temperature. It will tell the ignitor when it must turn on to initiate the heating process.


Hot Surface Ignitor: Once your furnace gets a signal coming from the thermostat that it must start working, it issues an electrical current to your ignitor that will in turn become red hot so that the burner lights up when it starts.


Burners: Once a furnace gets the thermostat’s signal for it to turn on, fuel is delivered to the burners that are in turn ignited by the incredibly hot surface ignitor. It generates an even and controlled flame that furnished heat to the unit’s heat exchanger.


Heat Exchanger: Among all the gas furnace parts, the heat exchanger is the one that ultimately deals with the generated heat. It is the first spot where combustion gasses enter once they’ve been generated by the burners. And when these combustion gasses are within the chamber of the heat exchanger, the gasses’ heat are absorbed by the metal walls. Inside the chamber, these combustion gasses are now cooled and released by the draft inducer blower into a pipe and carefully discharged from your home. While this action takes place, the blower motor pushes the air from within your home out of the heat exchanger without first absorbing heat from its walls and go into the plenum supply ducts to give you a warm and comfortable home.


You must also remember that this is the specific gas furnace part that deals with the deadly carbon monoxide. It is why you must arrange for the heat exchanger to be checked by a professional on a yearly basis to prevent the likelihood of having carbon monoxide leaks in your house. As the years go by, cracks can appear inside the heat exchanger that is responsible for the leak that can endanger you and your family’s life.


Flue: It is otherwise known as the exhaust stack. The flue is where all your waste exhaust is brought to. It is made up of fuel combustion from the gas furnace including carbon monoxide. In some houses, the exhaust can have the filter directed toward the chimney while some have it brought out of the house via a vent or a pipe. For those who aren’t aware yet, there is no flue in electric furnaces.


Supply Plenum: It is the duct connected to your reliable furnace that delivers the warm air all over your home. By now, you start seeing your furnace in a different light. And hopefully, it may have taught you what you needed to know to handle better unexpected furnace emergencies. Learn how to save on home energy and breath easier.

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