Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default the greater it's resistance to

the greater it's resistance to airflow

A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter

The A+2000 line is easy to maintain with no need to buy oils or adhesives to enhance effectiveness

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

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

Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default the greater it's resistance toIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. 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