How Often Should You Change Your AC Filter?
The filter is the cheapest part of your system and one of the most important.
Request an AC technicianCheck it monthly
Pull the filter out and hold it up to the light. If you cannot see light through it, change it.
What changes the schedule
Pets, dust, construction, allergies and how hard the system runs all make filters clog faster. Follow the filter maker’s guidance.
Use the right size
The size is printed on the edge of the old filter. A filter that does not fit lets dust bypass it.
Why it matters
A clogged filter cuts airflow, makes the system work harder and can cause the coil to freeze. See why is my AC not cooling.
More AC guides
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