This air cleaning system is perfect for allergy sufferers. featuring three integrated technologies, this filter removes particles, allergens, germs, bacteria and odors from a room. The charcoal pre-filter captures odors and large particles, such as lint and pet hair. air then moves through the true hepa filter, which eliminates 99.97% of airborne particles, as small as 0.3 microns in size, such as dust mites, debris, mold spores, pollens and pet dander. The filtered air then passes by a uv-c light, which kills bacteria and viruses by using titanium dioxide to decompose remaining molecules. Doctors recommend hepa air filtration systems to reduce exposure to indoor asthma triggers.