How often should I replace my 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 can last 60 to 90 days. Homes with pets, smokers, or allergy sufferers may need monthly changes. Check your filter monthly until you see a pattern. A dirty filter restricts airflow, reduces efficiency, and can cause your HVAC system to freeze up or overheat.
Why It Matters
Regular filter changes are the single most important and easiest HVAC maintenance task. They protect your equipment and improve air quality.
Related Questions
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