Merv 8 Pleated Air Filter - 8 7/8" x 19" x 1" Quantity:12-pack the more efficient a filter

the more efficient a filter is at removing particles

In general

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

Either way

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

Merv 8 Pleated Air Filter - 8 7/8" x 19" x 1" Quantity:12-pack the more efficient a filterAny 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.