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Need a different depth?

Same size, deeper filter

Below is 11-1/2x11-1/2 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.

11-1/2x11-1/2x2 Built to order 11-1/2x11-1/2x4 Built to order

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

  • 16x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    16x30x1 NaturalAire Healthy Ultra MERV 13

    $327.99
    $327.99
    Case of 12 $27.33/filter
  • 20x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    20x20x1 NaturalAire Healthy Ultra MERV 13

    $241.99
    $241.99
    Case of 12 $20.17/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
  • 17-5/8x35-5/8x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    17-5/8x35-5/8x1 NaturalAire Standard MERV 8

    $202.99
    $202.99
    Case of 12 $16.92/filter
  • 22x22x1 NaturalAire Odor Eliminator with Baking Soda MERV 8 air filter
    MERV 8
    AAF Flanders

    22x22x1 NaturalAire Odor Eliminator with Baking Soda MERV 8

    $91.99
    $91.99
    Case of 4 $23.00/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
  • 10x24x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    10x24x1 NaturalAire Healthy Ultra MERV 13

    $226.99
    $226.99
    Case of 12 $18.92/filter
  • 20x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    20x24x1 NaturalAire Microparticle MERV 10

    $109.99
    $109.99
    Case of 6 $18.33/filter
  • 24x24x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    24x24x1 NaturalAire Healthy Ultra MERV 13

    $261.99
    $261.99
    Case of 12 $21.83/filter
  • 18x18x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    18x18x1 NaturalAire Microparticle MERV 10

    $114.99
    $114.99
    Case of 6 $19.17/filter
  • 17x21x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $49.11 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 17x21x1 NaturalAire Standard MERV 8

    $104.88
    $104.88 $153.99
    Case of 12 $8.74/filter
  • 14x24x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $17.11 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 14x24x1 NaturalAire Standard MERV 8

    $79.88
    $79.88 $96.99
    Case of 12 $6.66/filter
  • 14x22x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $47.11 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 14x22x1 NaturalAire Standard MERV 8

    $105.88
    $105.88 $152.99
    Case of 12 $8.82/filter
  • 14x14x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    14x14x1 NaturalAire Microparticle MERV 10

    $74.99
    $74.99
    Case of 6 $12.50/filter
  • 10x20x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8Up to $30.76 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 10x20x1 NaturalAire Standard MERV 8

    $59.99
    $59.99 $90.75
    Case of 11 $5.45/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
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