21-1/2 x 21-1/2 x 4 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.
          • $22.35 1-Pack (22.35 each)
          • $36.96 2-Pack (18.48 each)
          • $52.17 3-Pack (17.39 each)
          • $65.24 4-Pack (16.31 each)
          • $77.50 5-Pack (15.50 each)
          • $92.64 6-Pack (15.44 each)
          • $166.92 12-Pack (13.91 each)
          • $26.82 1-Pack (26.82 each)
          • $45.40 2-Pack (22.70 each)
          • $64.08 3-Pack (21.36 each)
          • $80.08 4-Pack (20.02 each)
          • $96.40 5-Pack (19.28 each)
          • $114.42 6-Pack (19.07 each)
          • $205.92 12-Pack (17.16 each)
          • $31.88 1-Pack (31.88 each)
          • $51.86 2-Pack (25.93 each)
          • $73.20 3-Pack (24.40 each)
          • $91.48 4-Pack (22.87 each)
          • $108.70 5-Pack (21.74 each)
          • $129.66 6-Pack (21.61 each)
          • $233.40 12-Pack (19.45 each)
          View Terms and Conditions

          About 21-1/2 x 21-1/2 x 4 Air Filter

          • Actual Size: 21 1/2" x 21 1/2" x 3 3/4"
          • Product: P25S.0421H21H

          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

          • $22.35 1-Pack (22.35 each)
          • $36.96 2-Pack (18.48 each)
          • $52.17 3-Pack (17.39 each)
          • $65.24 4-Pack (16.31 each)
          • $77.50 5-Pack (15.50 each)
          • $92.64 6-Pack (15.44 each)
          • $166.92 12-Pack (13.91 each)
          • $26.82 1-Pack (26.82 each)
          • $45.40 2-Pack (22.70 each)
          • $64.08 3-Pack (21.36 each)
          • $80.08 4-Pack (20.02 each)
          • $96.40 5-Pack (19.28 each)
          • $114.42 6-Pack (19.07 each)
          • $205.92 12-Pack (17.16 each)
          • $31.88 1-Pack (31.88 each)
          • $51.86 2-Pack (25.93 each)
          • $73.20 3-Pack (24.40 each)
          • $91.48 4-Pack (22.87 each)
          • $108.70 5-Pack (21.74 each)
          • $129.66 6-Pack (21.61 each)
          • $233.40 12-Pack (19.45 each)
          View Terms and Conditions