Merv 8 Pleated Air Filter - 20" x 30" x 2" Quantity:12-pack the greater it's resistance to

the greater it's resistance to airflow

from the air stream

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

than standard fiberglass filters purchased at retail outlets

One way to overcome this problem is to increase the surface area of the filter media

Merv 8 Pleated Air Filter - 20" x 30" x 2" Quantity:12-pack the greater it's resistance toAny 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.