Size finder
Find your exact air filter
Enter your filter dimensions and MERV rating below. The size is printed on the cardboard edge of your current filter.
Filter size finder
The size is printed on the cardboard edge of your current filter — it reads like "16x20x1". That's width × height × depth in inches. If the label is worn, measure the old filter directly or measure the slot opening.
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MERV rating
Pricing for
In stock
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Free shipping on 2+ contiguous US
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Made in USA guaranteed
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Ships 24hrs Mon–Fri
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Easy returns 30 days
Can't find your size?
If your dimensions don't match a standard size, we offer custom-cut filters to any dimension.