18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821

3M 9821 | Our#: 110625
6 pack
 
 

18 x 24 x 1 Filtrete® Micro Allergen Reduction Filter from 3M - #9821. See all filters in this size

  • MERV 11 Rated
  • Change Every 3 Months
  • 18x24x1" Nominal
  • 17¾x23¾x⅞" Actual
$87.30 $112.99
Case of 6 Filters, $14.55 ea
In Stock
Ships Tomorrow, Oct. 17th
Est. Delivery By Oct. 24th

18" X 24" x 1"
Filtrete® Micro Allergen Reduction Filter from 3M - #9821 - 6 pack

The Filtrete® Micro Allergen Reduction Filter carries a 3M Microparticle Performance Rating (MPR) of 1000 - roughly equivalent to a MERV 11 rating

Click here for detailed comparison of 3M Filtrete® 1" Filters

Features:
  • Meets the American Lung Association® Health House® Indoor Air Quality Guidelines
  • No unnecessary antimicrobial chemicals added; Filtrete filtering material will not support the growth of bacteria, mold, mildew or fungi in normal use
  • Contains electrostatically charged media to filter and attract particles in the air
Attracts and captures large allergens like:
  • Pollen
  • Mold spores 
  •  Dust mite debris
Attracts and captures microscopic allergens like:
  • Smoke
  • Pet dander
  • Household dust
  • Smog
* This filter should be changed at least every 3 months.  Certain conditions in your home will significantly add particles to the air - this will cause the filter to capture more particles, shortening it's life to less than 3 months.  These conditions would include: dirty ductwork, pets, construction work, sanding projects, tobacco smoke, burning candles, fireplaces and wood-burning stoves.

WHY USE MPR RATHER THAN MERV RATING?

The  Heating, Ventilating and Air Conditioning (HVAC) industry uses the ASHRAE 52.2 Standard, which assigns a Minimum Efficiency Reporting Value (MERV) to a filter. One part of MERV reports a filter's ability to capture medium to large particles between 1 and 10 microns. This value is helpful in comparing the performance of different filters but it is not adequate alone because particles greater than one micron make up only about 1% of the contaminants in your indoor air.

Another part of MERV addresses submicron particles. 3M calls this the MPR or Microparticle Performance Rating. It measures a filter's ability to capture particles between 0.3 and 1.0 micron. Based on independent laboratory tests, 3M's MPR measures a filter's ability to capture submicron particles that make up 99% of the particles in the air, such as bacteri

REVIEW SNAPSHOT®

by PowerReviews
3M18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821
 
4.7

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Good size/fit (9)
  • Easy to install (8)
  • Durable (6)
  • Good value (4)

Cons

    Best Uses

    • Central AC (9)
    • Home (6)
    • Central heating (5)
      • Reviewer Profile:
      • Homeowner (10)

    Reviewed by 11 customers

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    Displaying reviews 1-10

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    5.0

    I TRUST 3M PRODUCTS

    By Allergic to Mold

    from SW Florida

    About Me Homeowner

    Verified Buyer

    Pros

    • Good Fit

    Cons

      Best Uses

      • Central AC

      Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

      I have purchased from IAQ for some time, and I can rely on their service.

       
      5.0

      You can feel the difference in the air!

      By Garden Girl

      from Southeastern Tennessee

      About Me Homeowner

      Verified Buyer

      Pros

      • Durable
      • Easy To Install
      • Good Fit
      • Good Value
      • Quiet

      Cons

        Best Uses

        • Central AC
        • Central Heating
        • Home

        Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

        I love these filters! They are easy to install and work very well in changing the air quality. It just feels cleaner and fresher when we use these filters. I've tried the cheaper kind, but the air feels somewhat musty in our downstairs den when we've used those. These are worth the money.

         
        4.0

        Great Price and Service

        By CJ the Handyman

        from Yatesville, PA

        About Me Homeowner

        Verified Buyer

        Pros

        • Easy To Install
        • Good Fit
        • Good Value

        Cons

          Best Uses

          • Central AC
          • Central Heating

          Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

          This product was easy to install with great service and quick delivery. Also, great price and one of the few places that I could find the size that I needed.

           
          5.0

          Great Product.

          By Wendell

          from Lake Charles, LA

          About Me Homeowner

          Verified Buyer

          Pros

          • Compact
          • Durable
          • Easy To Install
          • Good Fit
          • Good Value

          Cons

            Best Uses

            • Central AC
            • Central Heating
            • Home

            Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

            Great product, securely packed in a sturdy shipping box.

             
            5.0

            Quality product & dealer

            By Bill

            from Cape Cod,MA

            About Me Homeowner

            Verified Buyer

            Pros

            • Durable
            • Easy To Install
            • Fast shipping
            • Good Fit
            • Good Value

            Cons

              Best Uses

              • Central AC

              Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

              Quality filter at better than box store prices with fast shipping

               
              5.0

              Been using these filters for years

              By Fred the magnificent

              from las cruces new mexico

              About Me Homeowner

              Verified Buyer

              Pros

              • Durable
              • Easy To Install
              • Good Fit

              Cons

                Best Uses

                • Central AC
                • Central Heating
                • Home

                Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

                helps with allergies

                 
                4.0

                Excellent product and price.

                By Don

                from Mechanicsville, MD.

                About Me Homeowner

                Verified Buyer

                Pros

                • Durable
                • Easy To Install
                • Good Fit

                Cons

                  Best Uses

                  • Central AC
                  • Central Heating

                  Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

                  I needed a reliable filter for an odd sized air return in my home. This Filtrete filter is an excellent value and does a great job of filtering our air throughout the house. The big box retailers only carry standard size filters, but for many of us with older homes finding those odd sizes can be difficult. Ordering was easy [...]

                   
                  5.0

                  great reliable filter

                  By mei mei

                  from chicago, il

                  About Me Homeowner

                  Verified Buyer

                  Pros

                  • Compact
                  • Easy To Install
                  • Good Fit
                  • High quality

                  Cons

                  • Expensive

                  Best Uses

                  • Central AC
                  • Home

                  Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

                  the highest quality in market.

                   
                  5.0

                  Good Product

                  By Bill

                  from Harwich,MA

                  About Me Handyman, Homeowner

                  Verified Buyer

                  Pros

                  • Easy To Install
                  • Good Fit

                  Cons

                    Best Uses

                    • Central AC

                    Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

                    Great A/C filters.Good price,much cheaper than area home centers.[...]Nothing else need be said

                    (1 of 1 customers found this review helpful)

                     
                    4.0

                    Filtrete® Micro Allergen Reduction Filte

                    By SAS Fixer

                    from Flat Rock, NC

                    About Me Homeowner

                    Verified Buyer

                    Pros

                    • Remove airborne dust

                    Cons

                    • Paperboard frame wimpy

                    Best Uses

                    • Home

                    Comments about 3M 18 x 24 x 1 Filtrete Micro Allergen Reduction Filter - #9821:

                    [...]

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