Merv 11 Pleated Air Filter - 11 1/2" x 29 1/2" x 1" Quantity:12-pack the more efficient a filter

the more efficient a filter is at removing particles

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

degrade and restrict air flow

the A+2000 uses no foam that may clog

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Merv 11 Pleated Air Filter - 11 1/2" x 29 1/2" 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.