Practical Pleated Air Filter (2-Pack) - 20 3/4" x 30 3/4" x 5" Quantity:Default The permanent frame is constructed

The permanent frame is constructed of space-age plastics that are resistant to corrosion

Includes one Frame and PACK of 6 pads

the A+2000 uses stage loading

Unlike some permanent custom air filters

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

Practical Pleated Air Filter (2-Pack) - 20 3/4" x 30 3/4" x 5" Quantity:Default The permanent frame is constructedYes, we even have the odd sizes! The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters. In general, the more efficient a filter is at removing particles, the greater it's resistance to airflow, and the greater the pressure drop it creates. One way to overcome this problem is to increase the surface area of the filter media. The "Practical Pleat" contains over 500% greater surface