As the world’s first indoor air filtration system, the DuroPure™ patented, six-stage filtration system captures 100 percent of airborne particulates, including hexavalent chromium, and thoroughly cleans the air of VOC gases, safely returning clean air back to the working environment. Air is so clean that third-party testing confirmed it falls well below OSHA allowable standards. DuroPure™ technology also eliminates the need to exhaust contaminants to the outside environment.