Knowing how often to change air filters can make the difference in air conditioning and heating efficiency.

How often should I change my air filter? That’s an answer that stumps many homeowners. As cool, productive air conditioning is so important to maintaining a comfortable home, everybody with an HVAC system should know when filter replacement is due. However, the answer to how often a filter change is due depends on numerous factors. Different filters and air conditioning systems require replacement at widely varying times. Keep reading to learn what you need to know about the filters in your home, and how often you need to replace them.


Air conditioning professionals often denounce fiberglass filters. Fiberglass doesn’t do a good job of catching particles before they enter the air conditioning system, though they will capture larger things like insects or debris. However, the smaller particles eventually build up, and they can lead to respiratory problems for you or your family members.

If you are using a fiberglass filter, change it to something else as soon as you can. Most people who opt for fiberglass do it to save money, but it is not that much more expensive to change out your fiberglass filter for a pleated or accordion filter – and it is much better for your health and home.


Pleated filters are a step up from fiberglass filters. They do not need replacing nearly as often, and they work much more efficiently in removing particles before they can get into your air conditioning system. Most professionals recommend you change your pleated air filter at least once every three months. Pleated filters are rather inexpensive and easy to obtain.


Most HVAC pros agree, accordion-style air filters are the best option on the market. They are painstakingly designed to filter out large quantities of particles over an extended period. In fact, they are so efficient that they require replacement only once every six months.

Still questioning how often to change air filters? To learn more from professionals you can trust, get in touch with our friendly team of experts at Certified Electric, Inc.