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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.

  • 14x25x1 NaturalAire Microparticle MERV 10 85156.011425 (12 Filters)
    MERV 10
    AAF Flanders

    14x25x1 NaturalAire Microparticle MERV 10

    $121.99
    $121.99
    Case of 12 $10.17/filter
  • 14x14x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    14x14x1 NaturalAire Healthy Ultra MERV 13

    $178.99
    $178.99
    Case of 12 $14.92/filter
  • 14x25x1 NaturalAire Microparticle MERV 10 85256.011424 (6 Filters)
    MERV 10
    AAF Flanders

    14x25x1 NaturalAire Microparticle MERV 10

    $79.99
    $79.99
    Case of 6 $13.33/filter
  • 17-1/2x29-1/2x1 NaturalAire Standard MERV 8 84858.01175295 (12 Filters)
    MERV 8
    AAF Flanders

    17-1/2x29-1/2x1 NaturalAire Standard MERV 8

    $170.99
    $170.99
    Case of 12 $14.25/filter
  • 14x14x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    14x14x1 NaturalAire Microparticle MERV 10

    $106.99
    $106.99
    Case of 12 $8.92/filter
  • 14x20x1 NaturalAire Microparticle MERV 10 85256.011420 (6 Filters)
    MERV 10
    AAF Flanders

    14x20x1 NaturalAire Microparticle MERV 10

    $89.99
    $89.99
    Case of 6 $15.00/filter
  • 14x30x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    14x30x1 NaturalAire Standard MERV 8

    $149.99
    $149.99
    Case of 12 $12.50/filter
  • 20x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    20x30x1 NaturalAire Healthy Ultra MERV 13

    $228.99
    $228.99
    Case of 12 $19.08/filter
  • Custom Size NaturalAire Standard MERV 8 Air Filter
    MERV 8
    AAF Flanders

    Custom Size NaturalAire Standard MERV 8 Air Filter

    $208.99
    $208.99
  • 12x18x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    12x18x1 NaturalAire Healthy Ultra MERV 13

    $277.99
    $277.99
    Case of 12 $23.17/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
  • 08x14x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    8x14x1 NaturalAire Standard MERV 8

    $219.99
    $219.99
    Case of 12 $18.33/filter
  • 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
  • 20x30x1 NaturalAire Standard MERV 8 84858.012030 (12 Filters)
    MERV 8
    AAF Flanders

    20x30x1 NaturalAire Standard MERV 8

    $155.99
    $155.99
    Case of 12 $13.00/filter
  • 18x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    18x20x1 NaturalAire Microparticle MERV 10

    $204.99
    $204.99
    Case of 12 $17.08/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
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