How often should I change the filter in my air conditioner?

One of the easiest and least expensive things you can do to keep your A/C system running at its best is to change the filter every one to two months. Not only will this keep your A/C system working efficiently, but it will also improve your home’s indoor air quality.

A general rule of thumb is the more traffic your have in a home the more frequently you should change your A/C filter. If you have more than two people in your household and/or you have pets, you may want to change out your filter monthly. In particular, pet dander and pet hair can quickly block your A/C filter. 

The quality of the filter you select will determine how frequently you need to change it. Most homeowners use a 1” to 3” filter and can change it every 2 months. But if you are one of the millions of Americans who suffer from allergies, you may want to consider a higher quality filter, this will cost a little more upfront but you will breathe easier and it will be well worth the cost.

If you live in a warm, dusty climate you are more likely to pick up extra debris and pollutants in the air thus causing your filter to become dirtier faster. In addition, smoking, mold or moist climates will decrease the quality of air in your home and require more frequent change outs of your filter. To keep the air in your home at its best it's best to check the filter monthly.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

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