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Need a different depth?
Same size, deeper filter
Below is 18x18 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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Vendor:AAF Flanders18x25x1 NaturalAire Healthy Ultra MERV 13
Regular price $332.99Sale price $332.99 Regular priceUnit price Case of 12 $27.75/filter -
MERV 8Vendor:AAF FlandersNaturalAire Standard MERV 8
Regular price $81.99Sale price $81.99 Regular priceUnit price Case of 6 $13.67/filter -
MERV 13Vendor:AAF Flanders18x24x1 NaturalAire Healthy Ultra MERV 13
Regular price $243.99Sale price $243.99 Regular priceUnit price Case of 12 $20.33/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 Flanders12x12x1 NaturalAire Standard MERV 8
Regular price $97.99Sale price $97.99 Regular priceUnit price Case of 12 $8.17/filter -
MERV 10Vendor:AAF Flanders18x25x1 NaturalAire Microparticle MERV 10
Regular price $260.99Sale price $260.99 Regular priceUnit price Case of 12 $21.75/filter -
MERV 13Up to $31.51 offVendor:AAF FlandersWAREHOUSE DEAL 18x24x1 NaturalAire Healthy Ultra MERV 13
Only 1 leftRegular price $97.99Sale price $97.99 Regular priceUnit price Case of 7 $14.00/filter$129.50 -
MERV 10Vendor:AAF Flanders18x24x1 NaturalAire Microparticle MERV 10
Regular price $84.99Sale price $84.99 Regular priceUnit price Case of 6 $14.17/filter -
MERV 8Vendor:AAF Flanders14x25x1 NaturalAire Standard MERV 8
Regular price $105.99Sale price $105.99 Regular priceUnit price Case of 12 $8.83/filter -
Vendor:AAF Flanders18x36x1 NaturalAire Healthy Ultra MERV 13
Regular price $351.99Sale price $351.99 Regular priceUnit price Case of 12 $29.33/filter -
MERV 10Vendor:AAF Flanders18x25x1 NaturalAire Microparticle MERV 10
Regular price $127.99Sale price $127.99 Regular priceUnit price Case of 6 $21.33/filter -
MERV 1-4Vendor:KochDisposable Fiberglass Panel Filter
Regular price From $59.99Sale price From $59.99 Regular price -
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 10Vendor:AAF Flanders18x36x1 NaturalAire Microparticle MERV 10
Regular price $129.99Sale price $129.99 Regular priceUnit price Case of 6 $21.67/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 Flanders16x25x1 NaturalAire Microparticle MERV 10
Regular price $74.99Sale price $74.99 Regular priceUnit price Case of 6 $12.50/filter
