Merv 8 Pleated Air Filter - 18" x 22" x 1" Quantity:12-pack if not you can measure

if not you can measure it or check the HVAC unit and the owner‰۪s manual

Either way

degrade and restrict air flow

Eliminates Filter Bypass

Some of the other benefits of A+2000 custom air filters include the following

Merv 8 Pleated Air Filter - 18" x 22" x 1" Quantity:12-pack if not you can measureAny 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.