Pad Refills (Pack of 6 Pads) - 18" x 24" x 3/4" Quantity:Default the A+2000 uses stage loading

the A+2000 uses stage loading

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

The permanent frame is constructed of space-age plastics that are resistant to corrosion

This design enables A+2000 custom air filters to maintain performance over the years

Pad Refills (Pack of 6 Pads) - 18" x 24" x 3/4" Quantity:Default the A+2000 uses stage loadingPACK 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.