Merv 11 Pleated Air Filter - 21 3/8" x 21 1/2" x 1" Quantity:12-pack and long service life which

and long service life which reduces HVAC equipment maintenance and energy costs

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the more efficient a filter is at removing particles

from the air stream

the A+2000 uses stage loading

Merv 11 Pleated Air Filter - 21 3/8" x 21 1/2" x 1" Quantity:12-pack and long service life whichAny 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.