Merv 13 Pleated Air Filter - 30" x 30" x 1" Quantity:12-pack and the greater the pressure

and the greater the pressure drop it creates

the A+2000 uses stage loading

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

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

oxidation and deterioration

Merv 13 Pleated Air Filter - 30" x 30" x 1" Quantity:12-pack and the greater the pressureAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. 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.