Pad Refills (Pack of 6 Pads) - 17 1/4" x 23 1/4" x 1" Quantity:Default Either way

Either way

with each stage capturing progressively smaller particles inside the filter

To order washable electrostatic custom air filters you just need to know the size of the current air filter

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

oxidation and deterioration

Pad Refills (Pack of 6 Pads) - 17 1/4" x 23 1/4" x 1" Quantity:Default Either wayPACK 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.