Pad Refills (Pack of 6 Pads) - 21" x 22" x 3/4" Quantity:Default Can be ordered in packages

Can be ordered in packages of 2 each only

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop

In general

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

Pad Refills (Pack of 6 Pads) - 21" x 22" x 3/4" Quantity:Default Can be ordered in packagesPACK 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.