Search

Need a different depth?

Same size, deeper filter

Below is 12x20 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.

12x20x2 Built to order 12x20x4 Built to order

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

  • 14x20x1 NaturalAire Standard MERV 8 84858.011420 (12 Filters)
    MERV 8
    AAF Flanders

    14x20x1 NaturalAire Standard MERV 8

    $96.99
    $96.99
    Case of 12 $8.08/filter
  • 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
  • 16x20x4-1/2 NaturalAire Choice Allergen MERV 8 82655.0451620 (2 Filters)
    MERV 8
    AAF Flanders

    16x20x4-1/2 NaturalAire Choice Allergen MERV 8

    $164.99
    $164.99
    Case of 2 $82.50/filter
  • 15x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    15x20x1 NaturalAire Healthy Ultra MERV 13

    $281.99
    $281.99
    Case of 12 $23.50/filter
  • 20x25x3 NaturalAire Choice Allergen MERV 8 82655.032025 (3 Filters)
    MERV 8Contact Support
    AAF Flanders

    20x25x3 NaturalAire Choice Allergen MERV 8

    $210.99
    $210.99
    Case of 3 $70.33/filter
  • 20x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    WAREHOUSE DEAL 20x30x1 NaturalAire Microparticle MERV 10

    Only 1 left
    $124.88
    $124.88
    Case of 12 $10.41/filter
  • 16x20x1 NaturalAire Microparticle MERV 10 85256.011620 (6 Filters)
    MERV 10
    AAF Flanders

    16x20x1 NaturalAire Microparticle MERV 10

    $69.99
    $69.99
    Case of 6 $11.67/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
  • 16x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10Up to $41.11 off
    AAF Flanders

    WAREHOUSE DEAL 16x20x1 NaturalAire Microparticle MERV 10

    Only 1 left
    $98.88
    $98.88 $139.99
    Case of 12 $8.24/filter
  • 20x36x1 NaturalAire Standard MERV 8 84858.012036 (12 Filters)
    MERV 8
    AAF Flanders

    20x36x1 NaturalAire Standard MERV 8

    $186.99
    $186.99
    Case of 12 $15.58/filter
  • 10x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10Up to $48 offContact Support
    AAF Flanders

    WAREHOUSE DEAL 10x20x1 NaturalAire Microparticle MERV 10

    $89.99
    $89.99 $137.99
    Case of 12 $7.50/filter
  • 20x24x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    20x24x1 NaturalAire Microparticle MERV 10

    $199.99
    $199.99
    Case of 12 $16.67/filter
  • 20x25x1 NaturalAire Microparticle MERV 10 85156.012025 (12 Filters)
    MERV 10
    AAF Flanders

    20x25x1 NaturalAire Microparticle MERV 10

    $152.99
    $152.99
    Case of 12 $12.75/filter
  • 13x20x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    13x20x1 NaturalAire Standard MERV 8

    $232.99
    $232.99
    Case of 12 $19.42/filter
  • 15x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    Up to $10.39 off
    AAF Flanders

    WAREHOUSE DEAL 15x20x1 NaturalAire Healthy Ultra MERV 13

    Only 1 left
    $149.99
    $149.99 $160.38
    Case of 11 $13.64/filter
  • 15x20x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    15x20x1 NaturalAire Microparticle MERV 10

    $89.99
    $89.99
    Case of 6 $15.00/filter
Show more