MERV vs. MPR vs. FPR: Navigating Through Air Filter Rating Systems

Choosing the right air filter can be a daunting task. Have you wondered why there are 3 different rating systems? Certain brands have created their own rating system but, at the end of the day, they are rating the SAME filter! Unaware consumers often find themselves paying premium prices at grocery stores or big box retailers. Learn the facts and your next purchase will be much easier on your wallet.

MERV Rating (Minimum Efficiency Reporting Value) is the primary rating system used in the industry, both domestically and internationally. Established by ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers), MERV rates a filter’s ability to capture and hold particles and pollutants.

MPR (Micro-Particle Performance Rating) is a rating system developed by 3M. It rates the manufacturer’s filters and their ability to capture airborne particles smaller than 1 micron

FPR (Filter Performance Rating) is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color and number scale from 4 to 10 that closely resembles MERV rating.

The below chart will help you understand which of the ratings are comparable to each other:

MERV MPR FPR Efficiency Change Frequency
6 300 n/a Captures lint,household dust and pollen 30 Days
8 600 5/Green MERV 6 + dust mites & mold spores 90 Days
11 1000 – 1200 7/ Red MERV 8 + smoke, smog, cough/sneeze & pet dander 90 Days
13 1500 -1900 10/Blue MERV 11 + virus carries, odors & bacteria. 90 Days

2 thoughts on “MERV vs. MPR vs. FPR: Navigating Through Air Filter Rating Systems”

  1. Thank you for creating this post. Might need a bit of an update because Home Depot appears to have four ratings now:

    Suppose this could just be for the Honeywell filters…
    Either way, thanks!

    Like

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