Merv 13 Pleated Air Filter - 16 1/2" x 21" x 1" Quantity:12-pack Keeps HVAC system cleaner and

Keeps HVAC system cleaner and more efficient

Produces no ozone or aldehydes

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

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

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

Merv 13 Pleated Air Filter - 16 1/2" x 21" x 1" Quantity:12-pack Keeps HVAC system cleaner andAny 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.