A man squeezing a lemon into a frying pan on a stove.
Don’t let smells get you down.

Microparticles matter — they can make up to 99% of what we breathe.1

The smaller the microparticle, the more difficult it is to capture and the longer it stays in the air (or our lungs).1

  • A yellow filter pattern labelled 'Microparticle Performance Rating - MPR'.

    Scientists at 3M believe that MERV only tells part of the story, so we created a different measurement — Microparticle Performance Rating (MPR). This rating includes microscopic particles not visible to the naked eye — particles that are not even measured on the MERV scale until it reaches MERV 11.

    Exclusive Filtrete™ Brand filter technology focuses on capturing the tiniest particles – between 0.3 and 1 micron (µm) in size. Filtrete™ Healthy Living Filters capture bacteria, cough and sneeze particles, and even viruses.2

  • A grey filter pattern labelled 'Minimum Efficiency Reporting Value - MERV'.

    Minimum Efficiency Reporting Value (MERV) is the industry standard for measuring how well a heating and cooling system’s filter captures particles. MERV air filter ratings range from 1 (least efficient captureability) to 16 (very efficient).

    Filters with a MERV rating of 1-4 mostly filter out dust, lint and pollen among other larger, common particles — they do very little to trap small microparticles.

A yellow and grey filter pattern.

See why the MPR system is superior to the industry standard.

See comparison chart
  • An icon of three wavy lines, symbolizing airflow.
    Filtrete™ Brand Filters with MPR

    Many other rating systems like MERV do not consider the air resistance created by a filter. High air resistance makes your home’s heating and cooling less efficient, and can waste energy and may even damage your system. Filtrete™ Brand Filters are designed to deliver premium air filtration with low lifetime airflow resistance — this makes it ideal for your heating and cooling system.

  • An icon of a house.
    Make sure your air filter is measured by MPR

    The higher the MPR, the more microparticles your filter will capture as you run your heating or cooling system. From remodeling a home to adopting a new pet, each home has its unique filtration requirements. We can help you find the filter right for your home.

  • An icon of a magnifying glass and dozens of small particles.
    Understanding particle sizes

    Filtrete™ Brand technology makes it possible to capture the tiniest particles – between 0.3 and 1 micron in size — including bacteria and viruses through select high-performing filters within the portfolio.

The MPR system is the superior standard.2

The MPR indicates the filters ability to capture tiny particles between 0.3 and 1 micron in size. The higher the MPR, the more microparticles — such as pollen, pet dander, smoke, bacteria and viruses — your filter will capture.1,2

MPR 300
MPR 600
MPR 1000
MPR 1200
MPR 1500
MPR 1900
MPR 2200
  A circle with many small particles labelled 'E1: Particles between 0.3 to 1 microns'. A circle with many medium particles labelled 'E2: Particles between 1 to 3 microns'. A circle with many large particles labelled 'Particles between 3 to 10 microns'.
MERV 5 N/A N/A 20%
MPR 300 12% 38% 34%
MERV 7 N/A N/A 50%
MPR 600 23% 54% 55%
MERV 11 20% 65% 85%
MPR 1000 41% 77% 88%
MPR 1200 43% 78% 88%
MERV 12 35% 80% 90%
MPR 1500 54% 83% 90%
MERV 13 50% 85% 90%
MPR 1900 62% 87% 95%
MPR 2200 69% 90% 96%
  • See which filter is right for your home

  • Find Filtrete™ Filters in-store or online.


  1. ASHRAE Fundamental Handbook, 2001.
  2. 3M Interal study conducted. Data on file.
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