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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 13Vendor:AAF Flanders20x20x1 NaturalAire Healthy Ultra MERV 13
Regular price $241.99Sale price $241.99 Regular priceUnit price Case of 12 $20.17/filter -
MERV 8Vendor:AAF Flanders20x30x1 NaturalAire Standard MERV 8
Regular price $155.99Sale price $155.99 Regular priceUnit price Case of 12 $13.00/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 Flanders20x20x4-1/2 NaturalAire Choice Allergen MERV 8
Regular price $104.99Sale price $104.99 Regular priceUnit price Case of 2 $52.50/filter -
MERV 8Up to $20.11 offContact SupportVendor:AAF FlandersWAREHOUSE DEAL 20x20x5 NaturalAire Choice Allergen MERV 8
Regular price $89.88Sale price $89.88 Regular priceUnit price Case of 2 $44.94/filter$109.99 -
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 8Up to $17 offVendor:AAF FlandersWAREHOUSE DEAL 16x20x1 NaturalAire Standard MERV 8
Only 1 leftRegular price $79.99Sale price $79.99 Regular priceUnit price Case of 12 $6.67/filter$96.99 -
MERV 8Vendor:AAF Flanders10x20x1 NaturalAire Standard MERV 8
Regular price $98.99Sale price $98.99 Regular priceUnit price Case of 12 $8.25/filter -
MERV 8Vendor:AAF Flanders19x20x4 NaturalAire Choice Allergen MERV 8
Regular price $136.99Sale price $136.99 Regular priceUnit price Case of 2 $68.50/filter -
MERV 8Vendor:AAF Flanders18x30x1 NaturalAire Standard MERV 8
Regular price $154.99Sale price $154.99 Regular priceUnit price Case of 12 $12.92/filter -
MERV 10Vendor:AAF Flanders14x20x1 NaturalAire Microparticle MERV 10
Regular price $89.99Sale price $89.99 Regular priceUnit price Case of 6 $15.00/filter -
MERV 8Vendor:AAF Flanders
16x20x1 NaturalAire Standard MERV 8
Regular price $96.99Sale price $96.99 Regular priceUnit price Case of 12 $8.08/filter -
MERV 10Vendor:AAF Flanders20x30x1 NaturalAire Microparticle MERV 10
Regular price $94.99Sale price $94.99 Regular priceUnit price Case of 6 $15.83/filter -
MERV 11Vendor:AAF Flanders20x25x4-1/2 NaturalAire Optimum Allergen MERV 11
Regular price $145.99Sale price $145.99 Regular priceUnit price Case of 2 $73.00/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 Flanders10x20x1 NaturalAire Healthy Ultra MERV 13
Regular price $218.99Sale price $218.99 Regular priceUnit price Case of 12 $18.25/filter
