Merv 11 Pleated Air Filter - 29 3/4" x 35 3/4" x 1" Quantity:12-pack the greater it's resistance to

the greater it's resistance to airflow

Can be ordered in packages of 2 each only

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

the A+2000 uses stage loading

if not you can measure it or check the HVAC unit and the owner‰۪s manual

Merv 11 Pleated Air Filter - 29 3/4" x 35 3/4" x 1" 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.