Pad Refills (Pack of 6 Pads) - 21 1/2" x 22 1/2" x 3/4" Quantity:Default Filtering inserts are anti-microbial and

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

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

28X Increased Efficiency

if not you can measure it or check the HVAC unit and the owner‰۪s manual

Some of the other benefits of A+2000 custom air filters include the following

Pad Refills (Pack of 6 Pads) - 21 1/2" x 22 1/2" x 3/4" Quantity:Default Filtering inserts are anti-microbial andPACK 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.