Air Filter MERV Finder

Air Filter MERV Rating Finder

Find the right MERV rating for your home’s HVAC air filter, based on what you want it to capture.

A general guide. Higher MERV captures more but restricts airflow — very high ratings (MERV 13+) on a thin 1 in filter can strain some furnaces and blowers. Check your HVAC manufacturer’s maximum recommended MERV, and change filters on schedule.
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What MERV rating do I need?

MERV 8 handles basic dust; MERV 11 is the sweet spot for allergies and pets; MERV 13 captures smoke and fine particles and is the highest most homes should use. Going higher restricts airflow, so pair MERV 13 with a thicker 4–5 in filter when you can. Replace 1 in filters every 60–90 days.

MERV Captures Best for
8 Dust, pollen, lint Basic homes
11 Pet dander, fine pollen Allergies & pets
13 Smoke, bacteria Sensitive households