Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 25" x 1" Quantity:Default and the greater the pressure

and the greater the pressure drop it creates

To find the size the old unit should have sizing information printed on it

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

such as dust

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Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 25" x 1" Quantity:Default and the greater the pressureIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. Filtering inserts are anti microbial and are more efficient in capturing particles, such as dust, ragweed, pollen, etc., from the air stream, than standard fiberglass filters purchased at retail