subject: Indoor Odors - Track Them Down and Eliminate Them [print this page] Another method for eliminating indoor odors is with the use of a UV air purifying system. The UV air purifier cleans the air and removes odors by killing airborne germs. It works by radiating the air with UV-C short waves (relatively harmless to humans) as it passes through the system which kills off things like bacteria, mold and even viruses in the air. The radiation causes cellular level genetic damage to the bacteria, mold and/or virus, which destroys it. In rainy Portland, the existence of odors caused by bacteria and mold inside our homes is of serious concern, and an ultraviolet air purification system may help to alleviate some of those concerns.