Pad and Frame Air Filter (1 Frame and 6 Pads) - 20 3/4" x 26" x 1"Includes 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

Filtering inserts are anti-microbial and are more efficient in capturing particles

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such as dust

This is designed to fit into 1" Return Air Grilles

And there are no metal parts that could lead to corrosion or oxidation within the filter

if not you can measure it or check the HVAC unit and the owner‰۪s manual

Eliminates Filter Bypass

and the greater the pressure drop it creates

One way to overcome this problem is to increase the surface area of the filter media

the A+2000 uses no foam that may clog

Unlike some permanent custom air filters