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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 Flanders15x20x1 NaturalAire Standard MERV 8
Regular price $96.99Sale price $96.99 Regular priceUnit price Case of 12 $8.08/filter -
MERV 10Vendor:AAF Flanders10x10x1 NaturalAire Microparticle MERV 10
Regular price $225.99Sale price $225.99 Regular priceUnit price Case of 12 $18.83/filter -
MERV 10Vendor:AAF Flanders12x24x1 NaturalAire Microparticle MERV 10
Regular price $87.99Sale price $87.99 Regular priceUnit price Case of 6 $14.67/filter -
MERV 13Up to $40.31 offVendor:AAF FlandersWAREHOUSE DEAL 20x20x1 NaturalAire Healthy Ultra MERV 13
Only 1 leftRegular price $142.99Sale price $142.99 Regular priceUnit price Case of 10 $14.30/filter$183.30 -
MERV 10Vendor:AAF Flanders10x10x1 NaturalAire Microparticle MERV 10
Regular price $116.99Sale price $116.99 Regular priceUnit price Case of 6 $19.50/filter -
MERV 8Vendor:AAF Flanders16x16x1 NaturalAire Odor Eliminator with Baking Soda MERV 8
Regular price $56.99Sale price $56.99 Regular priceUnit price Case of 4 $14.25/filter -
Vendor:AAF Flanders19-1/2x23x1 NaturalAire Standard MERV 8
Regular price $266.99Sale price $266.99 Regular priceUnit price Case of 12 $22.25/filter -
MERV 8Vendor:AAF Flanders22x22x1 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 Flanders18x18x1 NaturalAire Standard MERV 8
Regular price $103.99Sale price $103.99 Regular priceUnit price Case of 12 $8.67/filter -
MERV 10Vendor:AAF Flanders23-1/2x23-1/2x1 NaturalAire Microparticle MERV 10
Regular price $273.99Sale price $273.99 Regular priceUnit price Case of 12 $22.83/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 Flanders22x24x1 NaturalAire Standard MERV 8
Regular price $175.99Sale price $175.99 Regular priceUnit price Case of 12 $14.67/filter -
MERV 1-4Vendor:RTFPrimeShield MAX Airflow MERV 1-4 Fiberglass Panel Basic Air Filters
Regular price From $57.99Sale price From $57.99 Regular priceUnit price Case of 12 $4.83/filter -
MERV 10Vendor:AAF Flanders12x18x1 NaturalAire Microparticle MERV 10
Regular price $118.99Sale price $118.99 Regular priceUnit price Case of 6 $19.83/filter -
MERV 8Vendor:AAF Flanders12x20x1 NaturalAire Standard MERV 8
Regular price $95.99Sale price $95.99 Regular priceUnit price Case of 12 $8.00/filter -
MERV 13Vendor:AAF Flanders14x20x1 NaturalAire Healthy Ultra MERV 13
Regular price $230.99Sale price $230.99 Regular priceUnit price Case of 12 $19.25/filter
