Merv 13 Pleated Air Filter - 21" x 21" x 1" Quantity:12-pack Instead of face loading (particles

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

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than standard fiberglass filters purchased at retail outlets

the more efficient a filter is at removing particles

To order washable electrostatic custom air filters you just need to know the size of the current air filter

Merv 13 Pleated Air Filter - 21" x 21" x 1" Quantity:12-pack Instead of face loading (particlesAny 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.