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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.

  • 21x22x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    21x22x1 NaturalAire Healthy Ultra MERV 13

    $332.99
    $332.99
    Case of 12 $27.75/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
  • 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
  • WAREHOUSE DEAL 16x20x1 NaturalAire Standard MERV 8 84858.011620 (12 Filters)
    MERV 8Up to $17 off
    AAF Flanders

    WAREHOUSE DEAL 16x20x1 NaturalAire Standard MERV 8

    Only 1 left
    $79.99
    $79.99 $96.99
    Case of 12 $6.67/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
  • 11-1/2x11-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $27.11 off
    AAF Flanders

    WAREHOUSE DEAL 11-1/2x11-1/2x1 NaturalAire Standard MERV 8

    Only 1 left
    $118.88
    $118.88 $145.99
    Case of 12 $9.91/filter
  • 24x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10Up to $28.11 off
    AAF Flanders

    WAREHOUSE DEAL 24x24x1 NaturalAire Microparticle MERV 10

    Only 1 left
    $59.88
    $59.88 $87.99
    Case of 6 $9.98/filter
  • 12x25x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $20.86 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 12x25x1 NaturalAire Standard MERV 8

    $39.99
    $39.99 $60.85
    Case of 5 $8.00/filter
  • 12x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    12x20x1 NaturalAire Microparticle MERV 10

    $74.99
    $74.99
    Case of 6 $12.50/filter
  • Naturalaire MERV 10 air filters custom size
    MERV 10
    AAF Flanders

    Custom Size NaturalAire Microparticle MERV 10 Air Filter

    $228.99
    $228.99
  • 22x22x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    22x22x1 NaturalAire Healthy Ultra MERV 13

    $213.99
    $213.99
    Case of 12 $17.83/filter
  • 17.5x23.5x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    17-1/2x23-1/2x1 NaturalAire Microparticle MERV 10

    $259.99
    $259.99
    Case of 12 $21.67/filter
  • 20x22-1/4x1 NaturalAire Standard MERV 8 84858.01202225 (12 Filters)
    MERV 8
    AAF Flanders

    20x22-1/4x1 NaturalAire Standard MERV 8

    $173.99
    $173.99
    Case of 12 $14.50/filter
  • 10x10x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    10x10x1 NaturalAire Microparticle MERV 10

    $116.99
    $116.99
    Case of 6 $19.50/filter
  • 18x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10Up to $18.11 off
    AAF Flanders

    WAREHOUSE DEAL 18x24x1 NaturalAire Microparticle MERV 10

    $59.88
    $59.88 $77.99
    Case of 6 $9.98/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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