21 x 21 x 1 Air Filter

  • MERV 8

    Pleated
      Fights lint, dust mites, mold spores, pollen, pet dander, and dust.
    • MERV 11

      Pleated
        Fights lint, dust mites, mold spores, pollen, pet dander, dust, and smoke.
      • MERV 13

        Pleated
          Fights lint, dust mites, mold spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria.
        • Select Quality

          Please Note: Due to COVID-19, MERV 11 media supplies are limited at this time. Please check back here soon for updates or consider our MERV 13 filters.
          • $25.99 1-Pack (25.99 each)
          • $32.48 2-Pack (16.24 each)
          • $42.96 3-Pack (14.32 each)
          • $48.12 4-Pack (12.03 each)
          • $58.90 5-Pack (11.78 each)
          • $68.64 6-Pack (11.44 each)
          • $123.72 12-Pack (10.31 each)
          • $29.53 1-Pack (29.53 each)
          • $33.36 2-Pack (16.68 each)
          • $45.75 3-Pack (15.25 each)
          • $58.60 4-Pack (14.65 each)
          • $71.60 5-Pack (14.32 each)
          • $83.94 6-Pack (13.99 each)
          • $151.08 12-Pack (12.59 each)
          • $31.32 1-Pack (31.32 each)
          • $41.06 2-Pack (20.53 each)
          • $60.15 3-Pack (20.05 each)
          • $77.28 4-Pack (19.32 each)
          • $93.95 5-Pack (18.79 each)
          • $110.64 6-Pack (18.44 each)
          • $199.20 12-Pack (16.60 each)
          View Terms and Conditions

          About 21 x 21 x 1 Air Filter

          • Actual Size: 20 7/8" x 20 7/8" x 3/4"
          • Product: P25S.012121

          MERV 8 Fights: Dust Mites, Mold Spores, Lint, Household Dust, Pollen

          MERV 11 Fights: Pet Dander, Smoke, Smog, Coughing, Sneezing, Dust Mites, Mold Spores, Lint, Household Dust, & Pollen

          MERV 13 Fights: Bacteria, Virus Carriers, Pet Dander, Smoke, Smog, Coughing, Sneezing, Dust Mites, Mold Spores, Lint, Household Dust, & Pollen

          What do you want in your 21x21x1 air filter? Obviously, clean air. Less unwanted debris in your home or office. Affordable prices would be great. The option to replace your filter less frequently would be the dream. With Air Filters Delivered, we want to make sure you get exactly what you want in your air filter. With manufacturing plants in the USA, we don't have to worry about vendor or overseas shipping costs, meaning we can provide the best possible prices on our 21x21x1 air filters. Our various MERV ratings offer options of increased filtration and fewer necessary replacements. Not only can you customize your order based on MERV rating, but you can choose from a 6-pack or 12-pack bundle, which means, potentially, all your air filters for the year can be purchased in just a few clicks. Free shipping available with every purchase.

          • $25.99 1-Pack (25.99 each)
          • $32.48 2-Pack (16.24 each)
          • $42.96 3-Pack (14.32 each)
          • $48.12 4-Pack (12.03 each)
          • $58.90 5-Pack (11.78 each)
          • $68.64 6-Pack (11.44 each)
          • $123.72 12-Pack (10.31 each)
          • $29.53 1-Pack (29.53 each)
          • $33.36 2-Pack (16.68 each)
          • $45.75 3-Pack (15.25 each)
          • $58.60 4-Pack (14.65 each)
          • $71.60 5-Pack (14.32 each)
          • $83.94 6-Pack (13.99 each)
          • $151.08 12-Pack (12.59 each)
          • $31.32 1-Pack (31.32 each)
          • $41.06 2-Pack (20.53 each)
          • $60.15 3-Pack (20.05 each)
          • $77.28 4-Pack (19.32 each)
          • $93.95 5-Pack (18.79 each)
          • $110.64 6-Pack (18.44 each)
          • $199.20 12-Pack (16.60 each)
          View Terms and Conditions