The Vacmaster Professional 8-gallon wet/dry vac is a certified HEPA system and is equipped with a powerful, quiet 2-stage industrial motor. It features 4 levels of filtration for HEPA compliance. To qualify as a HEPA system, a unit must capture and retain 99.97% of all contaminants down to 0.3 micron in particle size. In independent tests, the Vacmaster Professional VK811PH showed an efficiency of 99.996% in the 0.3 micron particle size range, meeting and exceeding the HEPA efficiency requirements set by the United States Environmental Protection Agency (EPA) and required under the Renovation, Repair, and Painting (RRP) Program. This commercial vac also comes with a lighted plug, crushproof industrial hose, and foam wet filter for picking-up liquid materials.