The 03 Pure air Purifier and Sterilizer combines the best technologies available today to cleanse the air of 99.9-percent of all airborne pollutants. Not just a filter, not simply a purifier, the 03 Pure air air purifier is the best of both worlds. The purifier features a 7-stage filtration system. The initial dirt, dust, and debris pre-filter traps large particles. A hospital grade washable HEPA filter with a 99.3-Percent filtration rate can capture microorganisms, bacteria, mold, and viruses below .3 microscopic particles. The UV2 ultraviolet sterilization stage mimics the sun’s sanitization properties. Artificial UV energy has proven to be 1,600 times more effective than the sterilization effect of the sun in killing viruses and bacteria, mold spores, mildew bacteria, and other airborne antigens and pathogens. The photo-catalytic filter oxidizes toxic fumes and decomposes odorous substances into odorless carbon dioxide and water. It also removes airborne bacteria and deactivates viruses. The activated carbon filter effectively removes bad smells, odors, smoke, etc.