Merv 11 Pleated Air Filter - 23 1/2" x 36" x 1" Quantity:12-pack It is designed to inhibit

It is designed to inhibit growth of bacteria

oxidation and deterioration

This is designed to fit into 1" Return Air Grilles

One way to overcome this problem is to increase the surface area of the filter media

built to last a lifetime

Merv 11 Pleated Air Filter - 23 1/2" x 36" x 1" Quantity:12-pack It is designed to inhibitAny 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.