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Need a different depth?

Same size, deeper filter

Below is 18x30 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.

18x30x2 Built to order 18x30x4 Built to order

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

  • 24x30x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    24x30x1 NaturalAire Healthy Ultra MERV 13

    $385.99
    $385.99
    Case of 12 $32.17/filter
  • 12x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    12x30x1 NaturalAire Microparticle MERV 10

    $237.99
    $237.99
    Case of 12 $19.83/filter
  • 12x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    12x30x1 NaturalAire Microparticle MERV 10

    $118.99
    $118.99
    Case of 6 $19.83/filter
  • 15x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    15x30x1 NaturalAire Microparticle MERV 10

    $246.99
    $246.99
    Case of 12 $20.58/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
  • 15x30x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    15x30x1 NaturalAire Standard MERV 8

    $167.99
    $167.99
    Case of 12 $14.00/filter
  • 16x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    16x30x1 NaturalAire Microparticle MERV 10

    $255.99
    $255.99
    Case of 12 $21.33/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
  • 18x25x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    18x25x1 NaturalAire Standard MERV 8

    $246.99
    $246.99
    Case of 12 $20.58/filter
  • 15x30x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    15x30x1 NaturalAire Microparticle MERV 10

    $123.99
    $123.99
    Case of 6 $20.67/filter
  • 18x18x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    18x18x1 NaturalAire Microparticle MERV 10

    $261.99
    $261.99
    Case of 12 $21.83/filter
  • 18x30x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter 10055.011830 (12 Filters)
    MERV 1-4
    AAF Flanders

    18x30x1 Flanders EZ Flow Fiberglass MERV 1-4 Filter

    $93.99
    $93.99
    Case of 12 $7.83/filter
  • Koch Disposable Fiberglass Panel Filter
    MERV 1-4
    Koch

    Disposable Fiberglass Panel Filter

    From $59.99
    From $59.99
  • Koch Multi-Pleat XL8 MERV 8 Standard Capacity (12 Filters)
    MERV 8
    Koch

    Multi-Pleat XL8 MERV 8 Standard Capacity

    From $103.99
    From $103.99
    Case of 12 $8.67/filter
  • PrimeShield MAX Airflow MERV 1-4 Fiberglass Panel Basic Air Filters (12 Pack)
    MERV 1-4
    RTF

    PrimeShield MAX Airflow MERV 1-4 Fiberglass Panel Basic Air Filters

    From $57.99
    From $57.99
    Case of 12 $4.83/filter
  • PrimeShield Essential MERV 8 Pleated Air Filters (12 Pack)
    MERV 8
    RTF

    PrimeShield Essential MERV 8 Pleated Air Filters

    From $99.99
    From $99.99
    Case of 12 $8.33/filter
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