10 Things That Impact the Longevity of Your Furnace – Part 1

How long does a furnace last? This is a question we get asked a lot, and unfortunately, there is no easy answer. The lifespan of a furnace can vary greatly, depending on a number of factors. In this blog, we’ll take a look at some of the things that can impact how long your furnace will last, so you can have a better idea of what to expect.

1. The Type of Furnace 

When it comes to home heating, there are two main types of furnaces: gas and oil. Gas furnaces tend to last longer than oil furnaces, with the average lifespan of a gas furnace being about 20 years. The average lifespan of an oil furnace is about 15 years.

2. The Quality of the Unit

Higher-quality furnaces will typically last longer than lower-quality units. This is because higher-quality furnaces are built to withstand more wear and tear, and they often have better warranties. If you’re wondering how long a particular furnace model will last, it’s a good idea to check out online reviews and see what other homeowners are saying.

3. The Level of Maintenance

Just like with any other appliance, regular maintenance is key to keeping your furnace running properly. A regularly serviced and maintained furnace will usually last longer than one that is not.

If you notice that your furnace isn’t working as well as it used to or if it’s making strange noises, don’t wait until it breaks down to get it repaired. Many furnace problems can be fixed before they turn into major issues. So, if you think there’s something wrong with your furnace, don’t hesitate to call a technician.

4. The Climate You Live In

Furnaces in cold climates have to work harder because they have to maintain a higher temperature in the home to offset the colder temperatures outside. The furnace has to run longer and work harder to maintain that temperature, which can lead to wear and tear on the furnace.

In a milder climate, the furnace wouldn’t have to work as hard because the temperatures outside are not as extreme. As a result, the furnace would last longer because it wouldn’t be under as much strain.

5. How Often You Change the Filter

Most furnace filters should be changed every three months, but if you have a pet or someone in your home with allergies, you may need to change it more often. A clogged or dirty filter can not only reduce the efficiency of your furnace but can also lead to premature wear and tear.

If you’re not sure how often to change your furnace filter, it is also best to check the manufacturer’s recommendations. Some filters can last up to 12 months, while others need to be changed every month or two.


All things considered, the average furnace will last between 15 and 20 years. However, if you take good care of your furnace and have it serviced regularly, it could last even longer.

So if you’re wondering how long your furnace will last, the best answer is that it depends on a number of factors. But with proper care and maintenance, you can help ensure that your furnace lasts for many years to come.

If your furnace is in need of repair, AutumnAir can help. We have experience in furnace installation and repair, and we can make sure your furnace is in good condition before the winter months. If you also need AC replacement in Birmingham, AL, we can help. Contact us today for more details!

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