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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® FFC26215TRN Replacement for Trane Perfect Fit BAYFTAH26M 21x26x5 2pk
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Filters Fast® FFC20256SG Replacement For AprilAire Space Gard 2200 20x25x6 - 2-Pack
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Filters Fast® FFC21235TRN Replacement for Trane Perfect Fit BAYFTAH23M 21x23.5x5- 2-Pack
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Filters Fast® FFC21235TRNM8 Replacement for Trane 21x23x5 Perfect Fit BAYFTAH23M 2-Pack
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Retail: $80.99

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Filters Fast® Replacement for Honeywell FC100A1003 MERV11, 16x20x5 - 2-Pack
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Retail: $70.99

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Lennox Y6605 16x26x5 MERV 16 PureAir 100908-11 for PCO3-16-16
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Retail: $159.99

Our Price: $129.99

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Filters Fast® FILXXCAR0024 Replacement for Carrier EXPXXFIL0024 24x25x5 - 2-Pack
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Retail: $79.99

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Filters Fast® Replacement for Trane Perfect Fit BAYFTAH21M 21.5x21x5, 2-Pack
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Filters Fast® Brand Replacement for Bryant FILXXCAR0116 MERV11, 16x25x5 - 2-Pack
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Retail: $70.99

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Filters Fast® Replacement for Trane 21x27x5 Perfect Fit BAYFTFR21M - 2-Pack
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Retail: $78.99

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Filters Fast® FFC20255TABM13 Replacement for Trion Air Bear Filter - 20x25x5, 2-Pack
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Filters Fast® FFC162766SG Replacement for AprilAire SpaceGard 2400 16x27x6 2-Pack
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Filters Fast® 4" MERV 11 20x25x4 Replacement for TopTech TT-FM-2025 3-Pack
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Filters Fast® FFC16253TABM8 Trion 255649-101 16x25x3 Filter 3-Pack
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Filters Fast® Replacement for Lennox X0585, 20x20x5 - 2-Pack
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Filters Fast® FFC175275TRN Replacement for Trane Perfect Fit BAYFTFR17M 17.5x27x5 2pk
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Filters Fast® Replacement for Carrier FILXXCAR0020 2-Pack - 20x25x5
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Filters Fast® FFC20255HONM8 Replacement for Honeywell 20x25x5 FC100A1037 2-Pack
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Filters Fast® Replacement for GeneralAire 6FM2025 - MERV11, 20x25x5 - 2-Pack
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Retail: $69.99

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Filters Fast® FFC26215TRNM13 Replacement for Trane BAYFTAH26M, 21x26x5 Perfect Fit - MERV13, 2-Pack
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Retail: $120.99

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Filters Fast® FFC20255HONM13 Replacement for Honeywell FC100A1037 - MERV 13, 2-PACK
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Filters Fast® FF20255X6673M8 Replacement for Lennox X6673 MERV8, 20x25x5 - 2-Pack
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Filters Fast® FFC24265TRN Replacement for Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
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Filters Fast® FFC162766SGM8 Replacement for AprilAire SpaceGard 2400 MERV8 - 2-Pack
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Retail: $74.99

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Filters Fast® FFC16255TAB Trion Compatible 16x25x5, 2-Pack
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Retail: $79.99

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