The one gallon, immediate containment HEPA (High Efficiency Particulate Air) filter, US Patent No. 7,048,773, is manufactured with Pentair® brand media is 99.97% efficient at .3 micron and includes three layers of 56 pleat media. The three layers consist of one cellulose layer and two glass layers. The HEPA filter captures everything from toner, currency dust, and hazardous debris.
