Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default To find the size the

To find the size the old unit should have sizing information printed on it

these can be purchased in any conceivable size

In general

Filtering inserts are anti-microbial and are more efficient in capturing particles

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

Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default To find the size thePACK 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.