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Need a different depth?
Same size, deeper filter
Below is 18x20 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 Flanders18x20x1 NaturalAire Standard MERV 8
Regular price $105.99Sale price $105.99 Regular priceUnit price Case of 12 $8.83/filter -
MERV 10Vendor:AAF Flanders18x20x1 NaturalAire Microparticle MERV 10
Regular price $93.99Sale price $93.99 Regular priceUnit price Case of 6 $15.67/filter -
MERV 13Vendor:AAF Flanders18x20x1 NaturalAire Healthy Ultra MERV 13
Regular price $193.99Sale price $193.99 Regular priceUnit price Case of 12 $16.17/filter -
MERV 10Vendor:AAF Flanders18x20x1 NaturalAire Microparticle MERV 10
Regular price $204.99Sale price $204.99 Regular priceUnit price Case of 12 $17.08/filter -
MERV 8Vendor:AAF Flanders20x20x1 NaturalAire Standard MERV 8
Regular price $104.99Sale price $104.99 Regular priceUnit price Case of 12 $8.75/filter -
MERV 10Vendor:AAF Flanders20x20x1 NaturalAire Microparticle MERV 10
Regular price $70.99Sale price $70.99 Regular priceUnit price Case of 6 $11.83/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 8Vendor:AAF FlandersNaturalAire Standard MERV 8
Regular price From $95.99Sale price From $95.99 Regular priceUnit price Case of 12 $8.00/filter -
MERV 1-4Vendor:AAF Flanders20x30x1 NaturalAire Cut-to-Fit Natural Fiber Washable Filter SM1006
Regular price $78.99Sale price $78.99 Regular priceUnit price Case of 6 $13.17/filter -
MERV 10Vendor:AAF FlandersNaturalAire Microparticle MERV 10
Regular price From $137.99Sale price From $137.99 Regular priceUnit price Case of 12 $11.50/filter -
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 10Vendor:AAF Flanders
20x20x1 NaturalAire Microparticle MERV 10
Regular price $140.99Sale price $140.99 Regular priceUnit price Case of 12 $11.75/filter -
MERV 10Vendor:AAF Flanders10x20x1 NaturalAire Microparticle MERV 10
Regular price $109.99Sale price $109.99 Regular priceUnit price Case of 12 $9.17/filter -
MERV 8Vendor:AAF Flanders20x20x5 NaturalAire Choice Allergen MERV 8
Regular price $109.99Sale price $109.99 Regular priceUnit price Case of 2 $55.00/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 13Vendor:AAF Flanders20x30x1 NaturalAire Healthy Ultra MERV 13
Regular price $228.99Sale price $228.99 Regular priceUnit price Case of 12 $19.08/filter
