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Need a different depth?

Same size, deeper filter

Below is 20x30 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.

20x30x2 Shop this size 20x30x4 Built to order

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

  • 20x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13Up to $40.31 off
    AAF Flanders

    WAREHOUSE DEAL 20x20x1 NaturalAire Healthy Ultra MERV 13

    Only 1 left
    $142.99
    $142.99 $183.30
    Case of 10 $14.30/filter
  • 20x25x1 NaturalAire Microparticle MERV 10 85256.012025 (6 Filters)
    MERV 10
    AAF Flanders

    20x25x1 NaturalAire Microparticle MERV 10

    $77.99
    $77.99
    Case of 6 $13.00/filter
  • 25x30x1 NaturalAire Standard MERV 8 84858.012530 (12 Filters)
    MERV 8
    AAF Flanders

    25x30x1 NaturalAire Standard MERV 8

    $180.99
    $180.99
    Case of 12 $15.08/filter
  • 12x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    12x30x1 NaturalAire Healthy Ultra MERV 13

    $312.99
    $312.99
    Case of 12 $26.08/filter
  • 20x22x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    20x22x1 NaturalAire Healthy Ultra MERV 13

    $329.99
    $329.99
    Case of 12 $27.50/filter
  • 14x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    14x30x1 NaturalAire Healthy Ultra MERV 13

    $234.99
    $234.99
    Case of 12 $19.58/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
  • 14x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    14x30x1 NaturalAire Microparticle MERV 10

    $89.99
    $89.99
    Case of 6 $15.00/filter
  • 10x20x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    10x20x1 NaturalAire Standard MERV 8

    $98.99
    $98.99
    Case of 12 $8.25/filter
  • 10x30x1 NaturalAire Standard MERV 8 84858.011030 (12 Filters)
    AAF Flanders

    10x30x1 NaturalAire Standard MERV 8

    $154.99
    $154.99
    Case of 12 $12.92/filter
  • 20x36x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    20x36x1 NaturalAire Healthy Ultra MERV 13

    $370.99
    $370.99
    Case of 12 $30.92/filter
  • 20x25x1 NaturalAire Microparticle MERV 10 85156.012025 (12 Filters)
    MERV 10
    AAF Flanders

    20x25x1 NaturalAire Microparticle MERV 10

    $152.99
    $152.99
    Case of 12 $12.75/filter
  • 20x22x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    20x22x1 NaturalAire Standard MERV 8

    $179.99
    $179.99
    Case of 12 $15.00/filter
  • 20x36x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    20x36x1 NaturalAire Microparticle MERV 10

    $160.99
    $160.99
    Case of 6 $26.83/filter
  • 25x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    25x30x1 NaturalAire Healthy Ultra MERV 13

    $380.99
    $380.99
    Case of 12 $31.75/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
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