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Complete Filter Size List

Complete Filter Size List

Find your filter size and save $20 today.
Choose your filter thickness below, then select your size. Use code KITTEN on orders over $100.

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MORE 1" FILTER SIZES

MORE 2" FILTER SIZES

FC100A1029 Honeywell 16x25x4

FC100A1011 Honeywell 20x20x4

FC100A1037 Honeywell 20x25x4

MORE 4" FILTER SIZES

FC100A1003 Honeywell 16x20x4

15 7/8 x 24 3/4 x 4 3/8

19 7/8 x 19 7/8 x 4 3/8

19 7/8 x 24 7/8 x 4 3/8

15 3/8 x 25 1/2 x 5 1/4

20 1/4 x 20 3/4 x 5 1/4

20 1/4 x 25 3/8 x 5 1/4

FC100A1011 Honeywell

FC100A1029 Honeywell

FC100A1037 Honeywell

MORE 5" FILTER SIZES

15 3/4 x 24 1/4 x 4 7/8

19 3/4 x 20 1/2 x 4 7/8

19 3/4 x 24 1/4 x 4 7/8

15 3/8 x 21 7/8 x 5 1/4

2026 Updated Furnace Filter Sizes Chart

Once you've found your perfect furnace filters and stocked up, how do you know the frequency with which you should change them? Learn more about it here: How Often To Change Furnace Filter

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