Free Shipping on orders over $99 | FREE 365-DAY RETURNS
Filters Fast Logo Header

FiltersFast replacement home air filters should be replaced every one to three months depending on air quality and usage. Replacement 1", 2", 4", and 5" air filters are available and come in select MERV ratings.

Find your Air Filter Size


Depth
Most common house filters are 1" in the depth or thickness. If you measure your filter to find the real thickness you will find that it isn't the same dimension as it states on the filter. This difference in the real dimension to the printed dimension are industry standards and can be confusing. The printed size on a filter is called nominal size and is not the real dimension of the filter. So a 1" thick filter is normally .75" thick. To make it easier to talk about sizes we use the nominal dimensions to refer to filter instead of the actual or real size. Because you are creating a filter by selecting the real dimensions, it is important to know the real dimensions of your filter instead of the nominal or printed dimensions that show on your filter. We will show you the nominal dimension for the Depth or thickness because there are only 1",2", or 4" sizes. Now you would select 1" for your filter if you are replacing a .75" filter, if your filter is 1.75" that would be a 2" filter and a 4" is 3.5"
/
Size
Nominal Size: The printed value of a filter dimension. (15"x20"x1")
Actual size: Actual or real sizes of filters are typically .5" less than the printed dimension or nominal value listed on the filter. A filter of 20"x24" would be 19.5"x23.5"
Need help? Call 866-438-3458. Our sales line is open Monday through Friday between the hours of 9am to 12:30pm and 1:30pm to 6pm EST.

FiltersFast Air Filters Product List:


Filters Fast® 4" MERV 11 16x20x4 Replacement for TopTech TT-FM-1620 3-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $89.99

Our Price: $79.95

Save 11%!

Filters Fast® FFC20205TAB Replacement for Trion 255649-103 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $89.99

Our Price: $64.95

Save 28%!

Filters Fast® FFC16255HON 16x25x5 MERV 11 Air Filter - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $70.99

Our Price: $50.95

Save 28%!

Filters Fast® Replacement for Amana M8-1056 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $80.99

Our Price: $65.95

Save 19%!

Filters Fast® Brand Replacement for White Rodgers DPFI16X26X5 MERV8, 16x26x5 - 2-Pack
In Stock!
Ships in 2 to 3 business days.

Retail: $64.99

Our Price: $55.95

Save 14%!

Filters Fast® 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $77.99

Our Price: $59.95

Save 23%!

Filters Fast® Brand Replacement for White Rodgers DPFI20X26X5 MERV8, 20x26x5 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $60.99

Our Price: $50.99

Save 16%!

Filters Fast® FF16255X6670M11 Replacement for Bryant-Carrier FILXXCAR0016 MERV11 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $58.95

Save 26%!

Filters Fast® Replacement for Lennox X0583 16x25x5, 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $70.99

Our Price: $50.95

Save 28%!

Filters Fast® FFC20205TABM8 20x20x5 Replacement for Skuttle 000-0448-003 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $69.99

Our Price: $49.95

Save 29%!

Filters Fast® FFC21275TRNM13 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - MERV13, 2-Pack
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $140.99

Our Price: $104.95

Save 26%!

Filters Fast® FFC175275TRN M13 Replacement for Trane Perfect Fit 17.5x27x5 MERV13 - 2-Pack
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $137.99

Our Price: $99.95

Save 28%!

Filters Fast® Replacement for GeneralAire 4367 - 20x20x5, 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $54.95

Save 31%!

Filters Fast® Replacement for Carrier KFAFK0212MED - MERV 8 - 6-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $62.95

Save 21%!

Filters Fast® FFC20255HONM13 Replacement for Honeywell FC200A1037 - MERV 13, 2-PACK
In Stock!
Ships in 1 to 2 business days.

Retail: $99.99

Our Price: $80.95

Save 19%!

Filters Fast® Replacement for Carrier FILXXFNC0021 MERV8 - 2-Pack 20x20x4.25
In Stock!
Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $62.95

Save 21%!

Filters Fast® Replacement for Amana M1-1056 MERV11, 16x25x5 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $70.99

Our Price: $60.95

Save 14%!

Filters Fast® Brand Replacement for Carrier FILXXCAR0124 MERV13, 24x25x5 - 2-Pack
In Stock!
Ships in 2 to 3 business days.

Retail: $109.99

Our Price: $87.95

Save 20%!

Filters Fast® Replacement for Goodman M1-1056 MERV11, 16x25x5 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $70.99

Our Price: $60.95

Save 14%!

Filters Fast® Replacement for Lennox X0585 20x20x5, MERV13 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $99.99

Our Price: $79.95

Save 20%!

Filters Fast® 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $77.99

Our Price: $59.95

Save 23%!

Filters Fast® FFC16253TAB Replacement for Trion 259112-101 3-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $80.99

Our Price: $69.95

Save 14%!

Filters Fast® FFC16253TABM13 Replacement for Trion 16x25x3 Air Bear MERV13 3-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $109.99

Our Price: $87.95

Save 20%!

Filters Fast® FFC21235TRNM13 Replacement for Trane BAYFTAH23M, 21x23x5 Perfect Fit- 2-Pack
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $140.99

Our Price: $99.95

Save 29%!

Filters Fast® Replacement for White Rodgers F825-0549, 20x26x5, 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $80.99

Our Price: $62.95

Save 22%!

Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 [ Back | Next ]