Merv 8 Pleated Air Filter - 27 1/2" x 33 1/2" x 1" Quantity:12-pack than standard fiberglass filters purchased

than standard fiberglass filters purchased at retail outlets

28X Increased Efficiency

This is designed to fit into 1" Return Air Grilles

some just refer to them as electrostatic filters

The A+2000 line is easy to maintain with no need to buy oils or adhesives to enhance effectiveness

Merv 8 Pleated Air Filter - 27 1/2" x 33 1/2" x 1" Quantity:12-pack than standard fiberglass filters purchasedAny 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.