Air Filter Ratings - MERV, MPR, FPR

What's the difference between MERV, MPR, and FPR?

There are three types of air filter rating systems:
  1. MERV- Minimum Efficiency Reporting Value
  2. MPR- Micro-Particle Performance Rating
  3. FPR- Filter Performance Rating


MERV is the industry standard, used around world while MPR and FPR are primarily used by the companies that created them. MPR was created and is used by 3M while FPR is created and used by Home Depot. None the less all of these rating systems were created to do the same thing... Rate Filters. Air filters are rated on their ability to catch and hold particles and pollutants that are measured in micrometers, aka microns.

The filters don't just clean the air but also help protect your AC and furnace from harmful particles and dirt build up.

MERV, MPR, FPR Cross Refrence Guide:

MERV 8
FPR 5/Green
MPR 600
What Gets Caught:
Dust, Pollen, Dust Mites, & Lint

MERV 11
FPR 7/Red
MPR 1000
What Gets Caught:
Dust, Pollen, Dust Mites, Lint, Spores, Smoke, Bacteria, & Dander

MERV 13
FPR 10/Blue
MPR 1900 - 2200
What Gets Caught:
Dust, Pollen, Dust Mites, Lint, Spores, Smoke, Bacteria, Dander, Virus Droplets, Smog & Odors

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