DESC: The S-900 is a powerful air purification solution for any environment! The HEPA filter removes 99.97% of airborne particles, including mold, spores, and tobacco smoke. The next layer of activated carbon virtually eliminates all odors in the room. Photo catalytic oxidation technology provides the ultimate in air purification for your home. High grade prefilter with active carbon absorbs odors and toxic gases. UV-C lamp is effective at eliminating bacteria and viruses smaller then 0.3 microns. Lab tests have shown that 90% of the bacteria and viruses are eliminated in the first pass. The Photo-Catalytic Oxidation (PCO) chamber provides 10,000 times the ultra violet intensity of comparable sunlight, which will break the chemical chain of Volitile Organic Compounds (VOC) and turn them into water and harmless gases. Perfect for those who suffer from respiratory problems!