Pad Refills (Pack of 6 Pads) - 15" x 21 3/4" x 1" Quantity:Default and long service life which

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

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

It is designed to inhibit growth of bacteria

and the greater the pressure drop it creates

Unlike some permanent custom air filters

Pad Refills (Pack of 6 Pads) - 15" x 21 3/4" x 1" Quantity:Default and long service life whichPACK 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.