Search

Need a different depth?

Same size, deeper filter

Below is 17-1/2x17-1/2 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.

17-1/2x17-1/2x2 Built to order 17-1/2x17-1/2x4 Built to order

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

  • 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
  • 11-1/2x11-1/2x1 NaturalAire Standard MERV 8 84858.01115115 (12 Filters)
    MERV 8
    AAF Flanders

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

    $159.99
    $159.99
    Case of 12 $13.33/filter
  • 23.5x23.5x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    23-1/2x23-1/2x1 NaturalAire Microparticle MERV 10

    $273.99
    $273.99
    Case of 12 $22.83/filter
  • 23-1/2x23-1/2x1 NaturalAire Healthy Ultra MERV 13 Filters (12 pack)
    AAF Flanders

    23-1/2x23-1/2x1 NaturalAire Healthy Ultra MERV 13

    $357.99
    $357.99
    Case of 12 $29.83/filter
  • 23.5x23.5x1 NaturalAire Microparticle MERV 10 Filters (12 pack)
    MERV 10
    AAF Flanders

    23-1/2x23-1/2x1 NaturalAire Microparticle MERV 10

    $129.99
    $129.99
    Case of 6 $21.67/filter
  • 19x21-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    19x21-1/2x1 NaturalAire Standard MERV 8

    $268.99
    $268.99
    Case of 12 $22.42/filter
  • 23-1/2x21-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    MERV 8
    AAF Flanders

    23-1/2x21-1/2x1 NaturalAire Standard MERV 8

    $200.99
    $200.99
    Case of 12 $16.75/filter
  • 23-1/2x23-1/2x1 NaturalAire Standard MERV 8 84858.01235235 (12 Filters)
    MERV 8
    AAF Flanders

    23-1/2x23-1/2x1 NaturalAire Standard MERV 8

    $146.99
    $146.99
    Case of 12 $12.25/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
  • 20x24x1 NaturalAire Standard MERV 8 84858.012024 (12 Filters)
    MERV 8
    AAF Flanders

    20x24x1 NaturalAire Standard MERV 8

    $110.99
    $110.99
    Case of 12 $9.25/filter
  • 29-1/2x23-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    29-1/2x23-1/2x1 NaturalAire Standard MERV 8

    $306.99
    $306.99
    Case of 12 $25.58/filter
  • 29-1/2x19-1/2x1 NaturalAire Standard MERV 8 Filters (12 pack)
    AAF Flanders

    29-1/2x19-1/2x1 NaturalAire Standard MERV 8

    $283.99
    $283.99
    Case of 12 $23.67/filter
  • WAREHOUSE DEAL 16x20x5 NaturalAire Choice Allergen MERV 8 (2 Filters)
    MERV 8Up to $55.11 off
    AAF Flanders

    WAREHOUSE DEAL 16x20x5 NaturalAire Choice Allergen MERV 8

    Only 1 left
    $149.88
    $149.88 $204.99
    Case of 2 $74.94/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
  • 21-1/2x23-1/2x1 NaturalAire Odor Eliminator with Baking Soda MERV 8 air filter
    MERV 8
    AAF Flanders

    21-1/2x23-1/2x1 NaturalAire Odor Eliminator with Baking Soda MERV 8

    $122.99
    $122.99
    Case of 4 $30.75/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
Show more