Pad Refills (Pack of 6 Pads) - 18" x 20" x 3/4"PACK of 6 pads for Pad and Frame Air Filters 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 outlets. Filtering inserts are shipped in an easily stored packet.

built to last a lifetime

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

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Can be ordered in packages of 2 each only

with each stage capturing progressively smaller particles inside the filter

You never have to hassle with disposable filters that will end up in a landfill again

the greater it's resistance to airflow

Either way

degrade and restrict air flow

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

The permanent frame is constructed of space-age plastics that are resistant to corrosion

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