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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"
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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® DSG201M11FF Replacement for BestAir SGMPR-B - 2-pack
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Retail: $59.99

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Filters Fast® FF16255X6670M8 Replacement for Lennox X6670 MERV8, 16x25x5 - 2-Pack
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Retail: $69.99

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Filters Fast® 4" 20x20x4 Replacement for TopTech TT-FM-2020 3-Pack
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Retail: $89.99

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Filters Fast® Replacement for GeneralAire 6FM1625 - MERV11, 16x25x5 - 2-Pack
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Retail: $79.99

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Filters Fast® FF16255X6670M13 Replacement for Lennox X6670 MERV13, 16x25x5 - 2-Pack
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Retail: $99.99

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Filters Fast® FFC16255HONM13 Replacement for Honeywell FC100A1029 16x25x4 MERV 13- 2-Pack
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Retail: $99.99

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Filters Fast® Replacement for Goodman M8-1056, 20x25x5 - 2-Pack
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Retail: $80.99

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Filters Fast® Replacement for Trane Perfect Fit BAYFTFR21M 21x27x5, 2-Pack
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Retail: $110.99

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Filters Fast® Brand Replacement for Carrier FILXXCAR0124 MERV11, 24x25x5 - 2-Pack
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Retail: $89.99

Our Price: $68.95

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Carrier 20x20x4.25 Merv 8 AC & Furnace Filter Replacement by Filters Fast® - 2-Pack
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Retail: $79.99

Our Price: $62.95

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Filters Fast® FFC20205HONM8 Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
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Retail: $59.99

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Filters Fast® DSG401M11FF Replacement For Space-Gard SG4PR-B, AprilAire 401 Filter - 2-Pack
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Retail: $79.99

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Filters Fast® Brand Carrier FILXXFNC0121 MERV 11- 2-Pack
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Retail: $89.99

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Filters Fast® FF20255X6673M13 Replacement for Lennox X6673 MERV13, 20x25x5 - 2-Pack
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Retail: $119.99

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Filters Fast® Replacement for White Rodgers F825-0548 Air Filter, 16x26x5 - 2-Pack
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Retail: $60.99

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Filters Fast® FFC20205TABM13 Trion 20x20x5 Air Bear 255649-103
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Filters Fast® FFC20265WRM8 Replacement for White Rodgers 20x26x5 F825-0549 2-Pack
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Retail: $69.99

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Filters Fast® MERV 8 Pleated Filters 6-Pack
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Retail: $99.99

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Filters Fast® FFC24265TRNM8 Replacement for Trane Perfect Fit BAYFTFR24M 2-Pack
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Retail: $79.99

Our Price: $59.95

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Filters Fast® FFC20205HONM13 Replacement for Honeywell FC100A1011, 20x20x5 2-Pack
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Retail: $99.99

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Filters Fast® Replacement for Honeywell TRUEclean FR8000F1625
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Retail: $89.99

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Filters Fast® Replacement for Bryant M8-1056, 20x25x5 - 2-Pack
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Retail: $80.99

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Filters Fast® Replacement for Goodman FS1625 MERV11, 16x25x5 - 2-Pack
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Retail: $70.99

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Filters Fast® FFC16255TABM13 Replacement for Trion 16x25x5 Air Bear MERV13 - 2-Pack
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Retail: $111.99

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Filters Fast® Replacement for Carrier P102-2025 - 20x25x5, MERV 11 - 2-Pack
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Retail: $80.99

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