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Need a different depth?

Same size, deeper filter

Below is 12x24 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.

12x24x2 Shop this size 12x24x4 Shop this size

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

  • 12x18x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    12x18x1 NaturalAire Microparticle MERV 10

    $233.99
    $233.99
    Case of 12 $19.50/filter
  • 18x24x1 NaturalAire Microparticle MERV 10 85156.011824 (12 Filters)
    MERV 10
    AAF Flanders

    18x24x1 NaturalAire Microparticle MERV 10

    $148.99
    $148.99
    Case of 12 $12.42/filter
  • 15x24x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    15x24x1 NaturalAire Standard MERV 8

    $169.99
    $169.99
    Case of 12 $14.17/filter
  • 12x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    Up to $79.21 off
    AAF Flanders

    WAREHOUSE DEAL 12x20x1 NaturalAire Healthy Ultra MERV 13

    Only 1 left
    $129.99
    $129.99 $209.20
    Case of 10 $13.00/filter
  • 24x36x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    24x36x1 NaturalAire Healthy Ultra MERV 13

    $409.99
    $409.99
    Case of 12 $34.17/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
  • 12x30x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    12x30x1 NaturalAire Standard MERV 8

    $129.99
    $129.99
    Case of 12 $10.83/filter
  • 18x24x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13Up to $31.51 off
    AAF Flanders

    WAREHOUSE DEAL 18x24x1 NaturalAire Healthy Ultra MERV 13

    Only 1 left
    $97.99
    $97.99 $129.50
    Case of 7 $14.00/filter
  • 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
  • 14x18x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    14x18x1 NaturalAire Microparticle MERV 10

    $217.99
    $217.99
    Case of 12 $18.17/filter
  • 12x27x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    12x27x1 NaturalAire Standard MERV 8

    $149.99
    $149.99
    Case of 12 $12.50/filter
  • 12x18x1 NaturalAire Standard MERV 8 84858.011218 (12 Filters)
    AAF Flanders

    12x18x1 NaturalAire Standard MERV 8

    $132.99
    $132.99
    Case of 12 $11.08/filter
  • 24x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    24x30x1 NaturalAire Microparticle MERV 10

    $275.99
    $275.99
    Case of 12 $23.00/filter
  • 08x24x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    8x24x1 NaturalAire Healthy Ultra MERV 13

    $219.99
    $219.99
    Case of 12 $18.33/filter
  • 10x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    10x24x1 NaturalAire Microparticle MERV 10

    $121.99
    $121.99
    Case of 6 $20.33/filter
  • 10x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    10x24x1 NaturalAire Microparticle MERV 10

    $242.99
    $242.99
    Case of 12 $20.25/filter
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