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How Do I Change an AC Filter?

First, make sure to turn off your HVAC unit. Then, go ahead and remove the old filter. Take note of which direction the airflow arrow is pointing. Assess its condition to see if it needs to be replaced, and then insert a new filter that’s the right type and has the correct dimensions. Make sure to insert the filter according to the direction of the arrow. The easiest way to check a filter’s condition is to hold it up to the light. If not much light shines through, it’s dirty and needs to be replaced.

Why Do I Need to Change an AC Filter?

AC filters keep your system running smoothly. A dirty AC filter will prevent easy airflow and can reduce the overall air quality in your home. This can keep you from cooling your home the way you’d like and will lead to more dust and debris in the air — meaning more allergies and general discomfort for your family.

What Filter Do I Use?

Check the dimensions and type of filter when you remove the old one (that info is usually located on the bottom of the filter), then simply match the new one to that.

Still not sure what to use? You can check your HVAC owner’s manual or search online to find the answer. If your AC filter is washable, then read up on how to clean your AC filter.

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