Pad Refills (Pack of 6 Pads) - 23 1/2" x 23 1/2" x 1" Quantity:Default You never have to hassle

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

Either way

the A+2000 uses stage loading

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

Pad Refills (Pack of 6 Pads) - 23 1/2" x 23 1/2" x 1" Quantity:Default You never have to hasslePACK 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.