Pad Refills (Pack of 6 Pads) - 20" x 23" x 1" Quantity:Default Can be ordered in packages

Can be ordered in packages of 2 each only

these can be purchased in any conceivable size

A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter

the more efficient a filter is at removing particles

Pad Refills (Pack of 6 Pads) - 20" x 23" x 1" 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.