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Need a different depth?

Same size, deeper filter

Below is 24x24 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.

24x24x2 Shop this size 24x24x4 Shop this size

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

  • 12x36x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    12x36x1 NaturalAire Healthy Ultra MERV 13

    $321.99
    $321.99
    Case of 12 $26.83/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
  • 15x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    Up to $10.39 off
    AAF Flanders

    WAREHOUSE DEAL 15x20x1 NaturalAire Healthy Ultra MERV 13

    Only 1 left
    $149.99
    $149.99 $160.38
    Case of 11 $13.64/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
  • 21x21x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    21x21x1 NaturalAire Healthy Ultra MERV 13

    $257.99
    $257.99
    Case of 12 $21.50/filter
  • 20x25x4-1/2 NaturalAire Choice Allergen MERV 8 82655.0452025 (2 Filters)
    MERV 8
    AAF Flanders

    20x25x4-1/2 NaturalAire Choice Allergen MERV 8

    $104.99
    $104.99
    Case of 2 $52.50/filter
  • 16x25x4-1/2 NaturalAire Choice Allergen MERV 8 82655.0451625 (2 Filters)
    MERV 8
    AAF Flanders

    16x25x4-1/2 NaturalAire Choice Allergen MERV 8

    $104.99
    $104.99
    Case of 2 $52.50/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
  • 19x21-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    19x21-1/2x1 NaturalAire Standard MERV 8

    $268.99
    $268.99
    Case of 12 $22.42/filter
  • 18x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    18x20x1 NaturalAire Microparticle MERV 10

    $93.99
    $93.99
    Case of 6 $15.67/filter
  • NaturalAire Healthy Ultra MERV 13 (4 Filters)
    MERV 13
    AAF Flanders

    NaturalAire Healthy Ultra MERV 13

    $100.99
    $100.99
    Case of 4 $25.25/filter
  • WAREHOUSE DEAL 16x20x5 NaturalAire Choice Allergen MERV 8 (2 Filters)
    MERV 8Up to $55.11 off
    AAF Flanders

    WAREHOUSE DEAL 16x20x5 NaturalAire Choice Allergen MERV 8

    Only 1 left
    $149.88
    $149.88 $204.99
    Case of 2 $74.94/filter
  • 20x25x3 NaturalAire Choice Allergen MERV 8 82655.032025 (3 Filters)
    MERV 8Contact Support
    AAF Flanders

    20x25x3 NaturalAire Choice Allergen MERV 8

    $210.99
    $210.99
    Case of 3 $70.33/filter
  • 21-1/4x23-1/4x1 NaturalAire Odor Eliminator with Baking Soda MERV 8 air filter
    MERV 8
    AAF Flanders

    21-1/4x23-1/4x1 NaturalAire Odor Eliminator with Baking Soda MERV 8

    $168.99
    $168.99
    Case of 4 $42.25/filter
  • 19-1/2x23x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    19-1/2x23x1 NaturalAire Standard MERV 8

    $266.99
    $266.99
    Case of 12 $22.25/filter
  • 29-1/2x19-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    Up to $162 off
    AAF Flanders

    WAREHOUSE DEAL 29-1/2x19-1/2x1 NaturalAire Standard MERV 8

    Only 1 left
    $114.99
    $114.99 $276.99
    Case of 12 $9.58/filter
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