The HEPAClean UV Tower Air Purifier features an advanced air cleaning system that combines 3 powerful air cleaning technologies into one compact air purifier to deliver cleaner fresher air to your home. Germ Fighting Ultraviolet Technology helps reduce viruses bacteria fungi and mold spores while the HEPAClean filters remove up to 99% of airborne particles such as dust pet dander smoke and pollen. In addition the enhanced odor control carbon zeolite pre-filter helps reduce common household odors such as pet cooking nursery and smoke odors. This air purifier will circulate and filter the air in your room up to 5 times every hour with whisper quiet performance. The permanent HEPAClean filters never need replacing--simply vacuum to clean when the Filter Gauge light indicates the filter is dirty. The easy-to-use hi-tech controls give you up to 12 different cleaning power levels. It also features a 1-18 hour auto shut-off timer an optional ionizer for extra cleaning power and optional oscillation to enhance air circulation. The sleek tower design saves space and will look great in any room in your home. Most effective for medium to large size rooms.