4" Purolator AC and Furnace Filter High Dust Holding Capacity M-8

Purolator's HE-40 pleated filters are made with 100% synthetic fibers providing mechanical efficiency to achieve a Merv 8 rating with low resistance to airflow. The media area and initial air flow resistance have been carefully balanced to withstand flow capacity up to 625 fpm while maximizing dust holding capacity. The 4" deep filters are designed with individual die cut fingers that separate and stabilize each pleat. Consistent pleat alignment enhances dust holding capacity for longer service life.