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

built to last a lifetime

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

This is designed to fit into 1" Return Air Grilles

You never have to hassle with disposable filters that will end up in a landfill again

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.