How often should I change the AC filter in my house?

Most homes benefit from every 60–90 days, though some require monthly replacements due to pets or allergies. If anyone in your household has respiratory conditions or if your system runs continuously during summer, more frequent changes may be necessary.

Where is the AC filter located?

Check behind return vents, near the air handler, or inside your furnace. Wall and ceiling locations are also common.

Which way should the AC filter face?

The arrows on the frame indicate airflow direction. Always point them toward the blower motor. Installing the component backwards can restrict airflow, reduce cooling efficiency, and increase wear on internal parts. If no arrows are visible, the less rigid side typically faces the incoming air, while the reinforced side should face the unit.

How do I replace an AC filter in a window unit?

Disconnect power, then open the front grille to access the insert. Remove it carefully, then clean or exchange depending on its type. Allow reusable media to dry fully after rinsing with mild soap and warm water. Use only approved replacements if the part is disposable. Keeping this element maintained supports cooling efficiency and protects key internal parts.

Can I run my AC without a filter?

Technically yes—but it’s highly discouraged. Dust and debris can damage internal parts, lower efficiency, and reduce air quality.

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