The PowerCore Filtration Technology has been proven in the field with more than a decade of use and over 15 million filters sold. Conventional cellulose fibers are larger than Ultra-Web nanofibers, and have larger spaces between the fibers, causing contaminant to load in the depth of the media and plug the airflow path; resulting in higher restriction and less capacity.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov