AirTamer^® is a personal air purifier and not a room air purifier. AirTamer^® is designed to clean the air around your head – about a 3-foot sphere is a good benchmark. The further your face is away from the AirTamer^®, the fewer ions will reach your breathing space, so we recommend hanging it from your neck and using the adjustable lanyard to adjust the length so the AirTamer^® is positioned in the upper part of your chest.