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How Does a Furnace Work?

If your home is heated by a furnace, it’s important to know how your heating system works. It will allow you to make better decisions about the maintenance of your furnace and can even help you extend the lifespan of your equipment. Find out how a furnace works from the heating experts at Arctic Air Conditioning. We’ve been providing homeowners in Monmouth, Middlesex, and Ocean County, New Jersey with exceptional heating services and advice since 1977. We can help you understand your home heating system so when it comes time for maintenance, you’ll understand what your furnace needs. Contact us today to learn more or schedule an appointment.

How a Furnace Works: A Complete Heating Cycle

A furnace is a type of forced-air central heating that heats the air in your home through the combustion of a fuel. The process of how a furnace works is by regulating the temperature through a series of steps that are repeated until the indoor air reaches the temperature set on the thermostat.

Here’s how a furnace works:

  1. When the thermostat determines that the temperature in the room has dropped below the temperature set on the thermostat, the heating cycle can begin.
  2. The inducer fan in your furnace will start, pulling enough air into the unit to establish combustion airflow.
  3. Once proper airflow is established, the gas valve opens to permit gas to flow through the burners and be ignited by a spark or heat from the igniter. (In older models, there is a “standing pilot” light which is a small flame that burns constantly to ignite the gas.) The spark or igniter will go out immediately after the flame has been lit.
  4. The flame will heat up the heat exchanger for approximately two minutes before the blower turns on. This allows the metal walls or tubing in your heat exchanger to absorb the heat from the flame so it can later be transferred into the air in your home. Another important step that occurs in your heat exchanger throughout this process is the release of toxic gases that are a byproduct of the fuel combustion. As carbon monoxide is collected in your heat exchanger, it is safely expelled through an exhaust vent out of the house.
  5. After the heat exchanger has reached the right temperature, the blower fan will engage, drawing air from the house through the return ducts and blowing over the heat exchanger, where it will absorb the heat energy stored there.
  6. The warmed air is pushed on by the blower into the supply ductwork to be redistributed back into your home.

This process will repeat multiple times until the desired temperature set on the thermostat is achieved. Understanding how a furnace works is very important for any homeowner, so if you have any questions about your heating system, contact Arctic Air Conditioning today. Or if your furnace isn’t functioning properly as you know it should be, we can provide exceptional furnace maintenance or furnace repair in Monmouth, Middlesex, or Ocean County, New Jersey. Our highly skilled and fully certified technicians can handle any furnace service you may need—contact us today to schedule a service call!

5 Rating |

”Kevin was great. He explained everything that needed to be done. Kept us in the loop so to speak. Could not ask for anyone better!”

- Ed Russin
5 Rating |

”We bought a new house and as luck would have it the AC went in the first few weeks. The Arctic Air Conditioning team was quick to come out and…”

- Michael Carrig
5 Rating |

”Again, Arctic Air did not disappoint! The experience from start to finish was first class, professional and efficient. The crew was thorough in its planning of the installation and thoughtful…”

- Semmes Brightman
5 Rating |

”I have used arctic air now on two seperate occasions. Each time a different technician . The reason why that is important, because they both were AWESOME. They do not…”

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”Excellent service. Technician was professional, candid, and efficient.”

- liz
5 Rating |

”The whole crew was awesome!! Thank you very much Artic Air.”

- Gary Brandspiegel
5 Rating |

”My air conditioning unit stopped working in 90 degree weather. Needless to say that it became very uncomfortable to live in my home. I googled “air conditioner repair” and scrolled…”

- HammRtrini
5 Rating |

”Great professional well done job by Dan. Thanks”

- Robert Contreras
5 Rating |

”Arctic Air is the 5th avenue of HVAC systems from the professional and efficient service from the staff to the follow up of the consumer services. They provide quality product,…”

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”👍👍Customer Service”

- Linda Wines
5 Rating |

”Great guy”

- Theresa Cretella
5 Rating |

”I can not speak highly enough about Artic Air. From consult to installation to follow up, they were fantastic! They responded to my call for help immediately. I appreciated their…”

- Deb Campanella
5 Rating |

”Had a very nice technician David Olivares from ARctic Air. Very knowledgeable and efficient. Fixed issues with A/C in 30 min. Great customer service personality.”

- Yelena Kurashova
5 Rating |

”Very professional and easy to work with. Would recommend to all my friends.”

- Sol Sassoon
5 Rating |

”Thoughtful, honest and professional. Also works neatly. Thats a triple threat plus one, well done and ty. Also was on time so...”

- Jay Olarsch
5 Rating |

”Excellent service. Anthony was very friendly and knowledgable. He took the time to answer all my questions. I highly recommend Artic air.”

- Gerald Della Femina
5 Rating |

”Anthony. Was nothing but helpful. Respectful and kind. Would recommend to anyone.”

- Tyler MacDonald
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”Quick and reliable”

- Jennifer Nocera
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”Tech Anthony Molnar was fantastic. Very professional and courteous!”

- Nelson Verdadeiro
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”We were very pleased with the job done. The team was very good, tidy and couldn't have been more pleasant.”

- Fred Loeser
5 Rating |

”Jesse Evert was my technician and I'm thrilled with the work that was done. Thank you”

- Kristaval Vanicek
5 Rating |

”Anthony was very helpful and knowledgeable with servicing and fixing both my air conditioning units. Highly recommend.”

- Margie Baskin
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”Frank was extremely professional and helpful. He was determined to find out the source of my problem and did not give up until he tracked it down, then showed me…”

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”Have great experience with Arctic Air. The service technicians are great to work with and they are very knowledgeable. Today I have Kyle B at my place to service my…”

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”The communication and follow up is great. Nick was on time, very professional and thorough.”

- J Paik
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