Pad Refills (Pack of 6 Pads) - 11 1/2" x 11 1/2" x 1" Quantity:Default They are easy to install

They are easy to install with custom air filters made to the sizes that you specify

You may know them as washable air or even permanent air filters

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

Instead of face loading (particles captured on the outer surface of the filter)

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

Pad Refills (Pack of 6 Pads) - 11 1/2" x 11 1/2" x 1" Quantity:Default They are easy to installPACK 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.