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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® Replacement for Carrier FC4B030 - 6-Pack
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Filters Fast® Replacement for Carrier FC4B036 - 6-Pack
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Filters Fast® Replacement for Carrier FA4A042 - 6-Pack
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Filters Fast® Replacement for Carrier FA4A048 - 6-Pack
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Filters Fast® Replacement for Carrier FA4A060 - 6-Pack
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Retail: $97.99

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Filters Fast® Replacement for Carrier FC4B042 - 6-Pack
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Filters Fast® Replacement for Carrier FB4A070 - 6-Pack
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Filters Fast® Replacement for Carrier FC4B054 - 6-Pack
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Filters Fast® Replacement for Carrier FC4B070 - 6-Pack
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Filters Fast® Replacement for Carrier FK4CNF005 - 6-Pack
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Retail: $139.99

Our Price: $115.40

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Filters Fast® Replacement for Carrier FK4ANF006 - 6-Pack
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Filters Fast® Replacement for Carrier FK4B006 - 6-Pack
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Filters Fast® Replacement for Heil NBH3024SKB1 - 6-Pack
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Filters Fast® Replacement for First Company VDX1030B-8 - 6-Pack
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Retail: $99.99

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Filters Fast® Replacement for Janitrol AW-30 - 6-Pack
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Filters Fast® Replacement for Janitrol A-24 - 6-Pack
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Filters Fast® Replacement for Janitrol A-36 - 6-Pack
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Filters Fast® Replacement for Janitrol A-42 - 6-Pack
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Filters Fast® Replacement for Janitrol A-49 - 6-Pack
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Filters Fast® Replacement for Janitrol A-48 - 6-Pack
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Filters Fast® Replacement for Janitrol A-60 - 6-Pack
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Filters Fast® Replacement for Janitrol A-61 - 6-Pack
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Filters Fast® Replacement for Lennox CB19-65 - 6-Pack
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Filters Fast® Replacement for Lennox CB19-51 - 6-Pack
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Filters Fast® Replacement for Lennox CB29M-21 - 6-Pack
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