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Need a different depth?

Same size, deeper filter

Below is 20x20 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.

20x20x2 Shop this size 20x20x4 Shop this size

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

  • 20x22x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    20x22x1 NaturalAire Healthy Ultra MERV 13

    $329.99
    $329.99
    Case of 12 $27.50/filter
  • 20x25x1 NaturalAire Microparticle MERV 10 85256.012025 (6 Filters)
    MERV 10
    AAF Flanders

    20x25x1 NaturalAire Microparticle MERV 10

    $77.99
    $77.99
    Case of 6 $13.00/filter
  • 20x22x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    20x22x1 NaturalAire Standard MERV 8

    $179.99
    $179.99
    Case of 12 $15.00/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
  • 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
  • 15x20x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    15x20x1 NaturalAire Standard MERV 8

    $96.99
    $96.99
    Case of 12 $8.08/filter
  • 19x20x4 NaturalAire Choice Allergen MERV 8 82655.041920 (2 Filters)
    MERV 8
    AAF Flanders

    19x20x4 NaturalAire Choice Allergen MERV 8

    $136.99
    $136.99
    Case of 2 $68.50/filter
  • 20x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.012020 (12 Filters)
    MERV 1-4
    AAF Flanders

    20x20x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $61.99
    $61.99
    Case of 12 $5.17/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
  • 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
  • 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
  • 16x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    MERV 13
    AAF Flanders

    16x20x1 NaturalAire Healthy Ultra MERV 13

    $224.99
    $224.99
    Case of 12 $18.75/filter
  • 10x20x1 NaturalAire Odor Eliminator with Baking Soda MERV 8 air filter
    MERV 8
    AAF Flanders

    10x20x1 NaturalAire Odor Eliminator with Baking Soda MERV 8

    $91.99
    $91.99
    Case of 4 $23.00/filter
  • 16x20x1 NaturalAire Standard MERV 8 84858.011620 (12 Filters)
    MERV 8
    AAF Flanders

    16x20x1 NaturalAire Standard MERV 8

    $96.99
    $96.99
    Case of 12 $8.08/filter
  • 12x20x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    12x20x1 NaturalAire Healthy Ultra MERV 13

    $268.99
    $268.99
    Case of 12 $22.42/filter
  • 20x22x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10Up to $20.01 off
    AAF Flanders

    WAREHOUSE DEAL 20x22x1 NaturalAire Microparticle MERV 10

    Only 1 left
    $119.99
    $119.99 $140.00
    Case of 7 $17.14/filter
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