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Need a different depth?
Same size, deeper filter
Below is 21x21 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.
Ordering for a building? Ask for volume pricing or call 1-866-469-8556.
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MERV 8Vendor:AAF Flanders17-1/2x21x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $97.99Sale price $97.99 Regular priceUnit price Case of 4 $24.50/filter -
MERV 11Vendor:AAF Flanders20x25x5 NaturalAire Optimum Allergen MERV 11
Regular price $145.99Sale price $145.99 Regular priceUnit price Case of 2 $73.00/filter -
MERV 10Vendor:AAF Flanders21x22x1 NaturalAire Microparticle MERV 10
Regular price $257.99Sale price $257.99 Regular priceUnit price Case of 12 $21.50/filter -
MERV 8Vendor:AAF Flanders18x24x1 NaturalAire Standard MERV 8
Regular price $111.99Sale price $111.99 Regular priceUnit price Case of 12 $9.33/filter -
MERV 10Vendor:AAF Flanders25x30x1 NaturalAire Microparticle MERV 10
Regular price $131.99Sale price $131.99 Regular priceUnit price Case of 6 $22.00/filter -
MERV 10Vendor:AAF Flanders16x24x1 NaturalAire Microparticle MERV 10
Regular price $72.99Sale price $72.99 Regular priceUnit price Case of 6 $12.17/filter -
MERV 8Vendor:AAF Flanders21-1/4x23-1/4x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $168.99Sale price $168.99 Regular priceUnit price Case of 4 $42.25/filter -
MERV 8Vendor:AAF Flanders20x24x1 NaturalAire Standard MERV 8
Regular price $110.99Sale price $110.99 Regular priceUnit price Case of 12 $9.25/filter -
MERV 8Vendor:AAF Flanders12x12x1 NaturalAire Standard MERV 8
Regular price $97.99Sale price $97.99 Regular priceUnit price Case of 12 $8.17/filter -
MERV 8Vendor:AAF Flanders16x24x1 NaturalAire Standard MERV 8
Regular price $102.99Sale price $102.99 Regular priceUnit price Case of 12 $8.58/filter -
MERV 8Vendor:AAF Flanders24x30x1 NaturalAire Standard MERV 8
Regular price $186.99Sale price $186.99 Regular priceUnit price Case of 12 $15.58/filter -
MERV 10Vendor:AAF FlandersCustom Size NaturalAire Microparticle MERV 10 Air Filter
Regular price $228.99Sale price $228.99 Regular price -
MERV 13Up to $34.13 offContact SupportVendor:AAF FlandersWAREHOUSE DEAL 18x18x1 NaturalAire Healthy Ultra MERV 13
Regular price $129.99Sale price $129.99 Regular priceUnit price Case of 11 $11.82/filter$164.12 -
MERV 13Vendor:AAF Flanders14x25x1 NaturalAire Healthy Ultra MERV 13
Regular price $249.99Sale price $249.99 Regular priceUnit price Case of 12 $20.83/filter -
MERV 8Vendor:AAF Flanders20x20x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $56.99Sale price $56.99 Regular priceUnit price Case of 4 $14.25/filter -
MERV 13Vendor:AAF Flanders16x25x1 NaturalAire Healthy Ultra MERV 13
Regular price $181.99Sale price $181.99 Regular priceUnit price Case of 12 $15.17/filter
