Pad and Frame Air Filter (1 Frame and 6 Pads) - 14" x 30" x 1" Quantity:Default from the air stream

from the air stream

with each stage capturing progressively smaller particles inside the filter

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

Either way

oxidation and deterioration

Pad and Frame Air Filter (1 Frame and 6 Pads) - 14" x 30" x 1" Quantity:Default from the air streamIncludes 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