Practical Pleated Air Filter (2-Pack) - 13 1/2" x 23 7/8" x 5" Quantity:Default the A+2000 uses stage loading

the A+2000 uses stage loading

They are constructed from 304 Stainless Steel material formed to exact specifications

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

The secret behind the A+2000‰۪s custom air filters performance is the patented stage loading/peak and valley design

28X Increased Efficiency

Practical Pleated Air Filter (2-Pack) - 13 1/2" x 23 7/8" x 5" Quantity:Default the A+2000 uses stage loadingYes, 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