Pad Refills (Pack of 6 Pads) - 21" x 23" x 1" Quantity:Default One way to overcome this

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

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

Unlike some permanent custom air filters

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

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 One way to overcome thisPACK 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.