Search
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.
-
MERV 13Vendor:AAF Flanders21x21x1 NaturalAire Healthy Ultra MERV 13
Regular price $257.99Sale price $257.99 Regular priceUnit price Case of 12 $21.50/filter -
MERV 8Vendor:AAF Flanders21x21x1 NaturalAire Standard MERV 8
Regular price $175.99Sale price $175.99 Regular priceUnit price Case of 12 $14.67/filter -
MERV 8Vendor:AAF Flanders20x21x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $91.99Sale price $91.99 Regular priceUnit price Case of 4 $23.00/filter -
MERV 8Vendor:AAF Flanders
21-1/2x23-1/2x1 NaturalAire Standard MERV 8
Regular price $183.99Sale price $183.99 Regular priceUnit price Case of 12 $15.33/filter -
MERV 8Vendor:AAF Flanders21x22x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $122.99Sale price $122.99 Regular priceUnit price Case of 4 $30.75/filter -
Vendor:AAF Flanders21x22x1 NaturalAire Healthy Ultra MERV 13
Regular price $332.99Sale price $332.99 Regular priceUnit price Case of 12 $27.75/filter -
MERV 8Vendor:AAF Flanders23-1/2x21-1/2x1 NaturalAire Standard MERV 8
Regular price $200.99Sale price $200.99 Regular priceUnit price Case of 12 $16.75/filter -
MERV 8Vendor:AAF FlandersCustom Size NaturalAire Standard MERV 8 Air Filter
Regular price $208.99Sale price $208.99 Regular price -
MERV 10Vendor:AAF Flanders21x22x1 NaturalAire Microparticle MERV 10
Regular price $120.99Sale price $120.99 Regular priceUnit price Case of 6 $20.17/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 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 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 8Vendor:AAF Flanders21-1/2x24x1 NaturalAire Standard MERV 8
Regular price $180.99Sale price $180.99 Regular priceUnit price Case of 12 $15.08/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 8Up to $49.11 offContact SupportVendor:AAF FlandersWAREHOUSE DEAL 17x21x1 NaturalAire Standard MERV 8
Regular price $104.88Sale price $104.88 Regular priceUnit price Case of 12 $8.74/filter$153.99 -
Vendor:AAF Flanders19x21-1/2x1 NaturalAire Standard MERV 8
Regular price $268.99Sale price $268.99 Regular priceUnit price Case of 12 $22.42/filter
