Merv 8 Pleated Air Filter - 13 1/4" x 13 1/4" x 2" 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

You may know them as washable air or even permanent air filters

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

we even have the odd sizes

some just refer to them as electrostatic filters

Merv 8 Pleated Air Filter - 13 1/4" x 13 1/4" x 2" 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.