Pad and Frame Air Filter (1 Frame and 6 Pads) - 18" x 25" x 1" Quantity:Default You may know them as

You may know them as washable air or even permanent air filters

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

the A+2000 uses stage loading

We look forward to delivering our American-made

Pad and Frame Air Filter (1 Frame and 6 Pads) - 18" x 25" x 1" Quantity:Default You may know them asIncludes 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