How often should I replace my HVAC air filter?
By Bob Millaway, South Jersey Community Expert & REALTOR®
Standard 1-inch fiberglass filters should be replaced every 30 days. Pleated filters with higher MERV ratings last 60 to 90 days. If you have pets, allergies, or live in a dusty area, change them more frequently. A dirty filter is the most common cause of HVAC problems.
Why It Matters
A clean filter improves air quality, protects your HVAC equipment, and keeps your system running efficiently. It is the simplest maintenance task you can do.
Related Questions
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