Pad Refills (Pack of 6 Pads) - 15 1/2" x 23 1/2" x 1" Quantity:Default the greater it's resistance to

the greater it's resistance to airflow

and long service life which reduces HVAC equipment maintenance and energy costs

Because we specialize in custom air filters

and the greater the pressure drop it creates

degrade and restrict air flow

Pad Refills (Pack of 6 Pads) - 15 1/2" x 23 1/2" x 1" Quantity:Default the greater it's resistance toPACK 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.