Merv 8 Pleated Air Filter - 18" x 20" x 1" Quantity:12-pack and the greater the pressure

and the greater the pressure drop it creates

Eliminates Filter Bypass

Filtering inserts are anti-microbial and are more efficient in capturing particles

with each stage capturing progressively smaller particles inside the filter

such as dust

Merv 8 Pleated Air Filter - 18" x 20" 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.