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Need a different depth?

Same size, deeper filter

Below is 14x18 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.

14x18x2 Built to order 14x18x4 Built to order

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

  • 18x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    18x20x1 NaturalAire Healthy Ultra MERV 13

    $193.99
    $193.99
    Case of 12 $16.17/filter
  • 14x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    14x30x1 NaturalAire Microparticle MERV 10

    $141.99
    $141.99
    Case of 12 $11.83/filter
  • 14x20x1 NaturalAire Microparticle MERV 10 85156.011420 (12 Filters)
    MERV 10
    AAF Flanders

    14x20x1 NaturalAire Microparticle MERV 10

    $178.99
    $178.99
    Case of 12 $14.92/filter
  • 18x24x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    18x24x1 NaturalAire Healthy Ultra MERV 13

    $243.99
    $243.99
    Case of 12 $20.33/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
  • 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
  • 18x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    18x30x1 NaturalAire Microparticle MERV 10

    $246.99
    $246.99
    Case of 12 $20.58/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
  • 25x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    25x30x1 NaturalAire Microparticle MERV 10

    $131.99
    $131.99
    Case of 6 $22.00/filter
  • 18x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    18x30x1 NaturalAire Healthy Ultra MERV 13

    $326.99
    $326.99
    Case of 12 $27.25/filter
  • Flanders AAF Pleated Filter Naturalaire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    NaturalAire Standard MERV 8

    $81.99
    $81.99
    Case of 6 $13.67/filter
  • 10x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    10x20x1 NaturalAire Microparticle MERV 10

    $109.99
    $109.99
    Case of 12 $9.17/filter
  • 14x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    14x20x1 NaturalAire Healthy Ultra MERV 13

    $230.99
    $230.99
    Case of 12 $19.25/filter
  • 14x22x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    14x22x1 NaturalAire Standard MERV 8

    $167.99
    $167.99
    Case of 12 $14.00/filter
  • 18x36x1 NaturalAire Standard MERV 8 84858.011836 (12 Filters)
    MERV 8
    AAF Flanders

    18x36x1 NaturalAire Standard MERV 8

    $193.99
    $193.99
    Case of 12 $16.17/filter
  • 18x24x1 NaturalAire Microparticle MERV 10 85256.011824 (6 Filters)
    MERV 10
    AAF Flanders

    18x24x1 NaturalAire Microparticle MERV 10

    $84.99
    $84.99
    Case of 6 $14.17/filter
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