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Need a different depth?

Same size, deeper filter

Below is 12x12 at 1 naturalaire″. A thicker filter holds more before it loads up, so it lasts longer between changes and puts less strain on the blower — we carry the same width and height in the depths below.

12x12x2 Built to order 12x12x4 Built to order

Ordering for a building? Ask for volume pricing or call 1-866-469-8556.

  • 12x36x1 NaturalAire Standard MERV 8 84858.011320 (12 Filters)
    MERV 8
    AAF Flanders

    12x36x1 NaturalAire Standard MERV 8

    $147.99
    $147.99
    Case of 12 $12.33/filter
  • 21x22x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    21x22x1 NaturalAire Healthy Ultra MERV 13

    $332.99
    $332.99
    Case of 12 $27.75/filter
  • 20x22x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    20x22x1 NaturalAire Microparticle MERV 10

    $261.99
    $261.99
    Case of 12 $21.83/filter
  • 12x24x1 NaturalAire Healthy Ultra MERV 13 95003.011224 (12 Filters)
    MERV 13
    AAF Flanders

    12x24x1 NaturalAire Healthy Ultra MERV 13

    $174.99
    $174.99
    Case of 12 $14.58/filter
  • 14x25x1 NaturalAire Standard MERV 8 84858.011425 (12 Filters)
    MERV 8
    AAF Flanders

    14x25x1 NaturalAire Standard MERV 8

    $105.99
    $105.99
    Case of 12 $8.83/filter
  • 20x20x1 NaturalAire Microparticle MERV 10 85256.012020 (6 Filters)
    MERV 10
    AAF Flanders

    20x20x1 NaturalAire Microparticle MERV 10

    $70.99
    $70.99
    Case of 6 $11.83/filter
  • 17-1/2x23-1/2x1 NaturalAire Standard MERV 8 84858.01175235 (12 Filters)
    AAF Flanders

    17-1/2x23-1/2x1 NaturalAire Standard MERV 8

    $156.99
    $156.99
    Case of 12 $13.08/filter
  • 12x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    12x30x1 NaturalAire Microparticle MERV 10

    $118.99
    $118.99
    Case of 6 $19.83/filter
  • 10x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    10x20x1 NaturalAire Healthy Ultra MERV 13

    $218.99
    $218.99
    Case of 12 $18.25/filter
  • 18x20x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    18x20x1 NaturalAire Standard MERV 8

    $105.99
    $105.99
    Case of 12 $8.83/filter
  • 24x36x1 NaturalAire Standard MERV 8 84858.012436 (12 Filters)
    MERV 8
    AAF Flanders

    24x36x1 NaturalAire Standard MERV 8

    $188.99
    $188.99
    Case of 12 $15.75/filter
  • 16x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    16x20x1 NaturalAire Healthy Ultra MERV 13

    $224.99
    $224.99
    Case of 12 $18.75/filter
  • 14x25x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    14x25x1 NaturalAire Healthy Ultra MERV 13

    $249.99
    $249.99
    Case of 12 $20.83/filter
  • 16x25x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    16x25x1 NaturalAire Healthy Ultra MERV 13

    $181.99
    $181.99
    Case of 12 $15.17/filter
  • 11-1/2x11-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $27.11 off
    AAF Flanders

    WAREHOUSE DEAL 11-1/2x11-1/2x1 NaturalAire Standard MERV 8

    Only 1 left
    $118.88
    $118.88 $145.99
    Case of 12 $9.91/filter
  • 10x10x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    10x10x1 NaturalAire Healthy Ultra MERV 13

    $265.99
    $265.99
    Case of 12 $22.17/filter
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