Merv 11 Pleated Air Filter - 8 3/8" x 11" x 2" Quantity:12-pack some just refer to them

some just refer to them as electrostatic filters

we even have the odd sizes

the more efficient a filter is at removing particles

Instead of face loading (particles captured on the outer surface of the filter)

Finally they are factory made so you don‰۪t have to deal with the hassle of trying to cut and size your custom air filters and they come with a full warranty

Merv 11 Pleated Air Filter - 8 3/8" x 11" x 2" Quantity:12-pack some just refer to themAny 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.