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  4. MPR: How to Choose Your Best Filtrete™ Home Air Filter
  • Why Your Home Air Filter’s MPR Matters

    When did you last examine the strength of your filter’s MPR?

    When did you last examine the strength of your air filter’s microparticle performance rating?

    • Seasonal transitions—especially winter to spring—can kick up a lot of unwanted air particles in homes and outside. Many of these particles are too small to see.

      The good news: you don’t need to work overtime to help protect and improve your indoor air quality. Instead, let a high-efficiency air filter for your heating and cooling system do the work for you. If you already use a Filtrete™ Air Filter, you benefit daily from electrostatic technology, which causes the filter to act like a magnet, capturing large and small airborne particles and allergens.

      When you’re purchasing a new Filtrete™ Filter, the MPR number is important to keep in mind. Here’s what you need to know.

      What is MPR rating?

      MPR stands for Microparticle Performance Rating, and it’s how Filtrete™ Brand reports a filter's ability to pull in and trap tiny particles between 0.3 and 1 micron in size. For reference, an average strand of human hair is about 70 microns in size. That’s nearly 70 times larger than the largest fine particle.1

      What MPR filter do I need?

      Keep in mind: the higher the MPR, the more small particles your home air filter can capture. So if the goal is to help protect your home from allergens, paying close attention to the MPR on Filtrete™ Filters becomes increasingly important.

    Here’s a quick guide to help determine which level of Filtrete™ Brand indoor air filtration works best for you.

    Here’s a quick guide to help determine which level of Filtrete™ Brand filtration works best for you: Good filtration: MPR 600; Better filtration: MPR 800 to 1200D; Best filtration: MPR 1500 to 2800

    • Good home air filtration: MPR 600

      If you want a good option for capturing pollen, mold spores and large particles, such as lint and household dust, consider Filtrete™ Clean Living Air Filters with an MPR of at least 600.

      Better home air filtration: MPR 800 to 1200D

      Allergen defense filters, including Filtrete™ Allergen Defense Filters, are capable of capturing even more particles. This level is the better option if you want to capture lint, household dust, dust mite debris, mold spores, pollen and pet dander.

      Best home air filtration: MPR 1500 to 2800

      Healthy Living Filters, which include our revolutionary Filtrete™ Smart Filters, are our best solutions for capturing allergens, in addition to dust, bacteria and viruses.


      1. Environmental Protection Agency

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