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  • Writer's pictureJustin Leach

How Often Should You Replace Your Furnace Filter?

As a homeowner, it's important to take care of your HVAC system to ensure it runs efficiently and keeps you and your family comfortable throughout the year. One of the simplest and most important things you can do is to replace your furnace filter. But how often should you do it? In this blog post, we'll discuss the factors that affect how frequently your filter needs to be changed, and offer tips on how to keep your HVAC system running smoothly.



This filter was so dirty/restrictive, that the blower fan actually sucked in into the fan blades and chewed it up!

The type of furnace filter you have influences how often you need to replace it. Some filters, such as disposable fiberglass filters, need to be replaced every 1-3 months. Higher-end filters, such as pleated and electrostatic filters, can last up to six months or even a year. The quality of air in your home, the number of people and pets in the household, and the level of outdoor air pollution in your area can all impact the lifespan of your filter. A filter that collects a lot of debris, such as pet hair or smoke, will need to be replaced more frequently than one that doesn't.


Another factor to consider is the time of year. During the fall and winter, when your furnace is running frequently, your filter will need to be replaced more often. This is because your HVAC system is working harder, and more debris is being pulled into your filter. In the spring and summer, when your air conditioning system is in use, you may be able to go longer between filter replacements.


It's also important to consider the consequences of not changing your filter. Over time, a dirty or clogged filter can cause your HVAC system to work less efficiently, leading to higher utility bills and increased wear and tear on the system. It can also impact your indoor air quality, causing allergies and other respiratory issues. In extreme cases, a dirty filter can cause your HVAC system to fail completely, requiring expensive repairs or even replacement.




As you can see, this house has a lot of cats!

To ensure that you're changing your filter often enough, it's a good idea to set a reminder on your calendar or phone. Most HVAC professionals recommend that you check your filter once a month, especially during periods of heavy use. If the filter looks dirty, it's time to replace it. Be sure to use the correct size and type of filter for your system, as using the wrong filter can also cause damage or reduce efficiency.


Finally, consider upgrading to a higher-end filter to improve the efficiency and air quality of your home. HEPA filters, for example, are highly effective at trapping pollutants and allergens, and can be a good choice for those with asthma or other respiratory issues. Just be aware that these filters may need to be replaced more frequently than lower-end options.


Replacing your furnace filter is a simple but important step in keeping your HVAC system running smoothly and your indoor air quality healthy. By considering the factors discussed in this blog post - such as filter type, time of year, and frequency of use - you can determine how frequently you need to replace your filter and avoid the negative consequences of neglecting this task. As always, if you have questions or concerns about your HVAC system, be sure to consult with a trusted professional.



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Glenn Washington
Glenn Washington
18. Apr.

I recently had my furnace filter replaced by HVAC Contractor Davie company, and I'm thoroughly impressed by their expertise and efficiency. Not only did they replace the filter, but they also took the time to educate me on proper maintenance practices to keep my HVAC system running smoothly.

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