Merv 11 Pleated Air Filter - 9 7/8" x 21" x 1" Quantity:12-pack A higher MERV rating means

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

Kills bacteria

To find the size the old unit should have sizing information printed on it

than standard fiberglass filters purchased at retail outlets

oxidation and deterioration

Merv 11 Pleated Air Filter - 9 7/8" x 21" x 1" Quantity:12-pack A higher MERV rating meansAny 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.