The Venta Airwasher LW45 2-in-1 Humidifier and Air Purifier humidifies and purifies indoor air simultaneously. There are no filters that need to be replaced; water serves as the filter. Venta Airwasher LW45 2-in-1 Humidifier and Air Purifier uses very low power consumption, operating at 8 watts of energy or less Suitable for a room up to 800 square feet, making it ideal for bedrooms, offices, living rooms, and dens Uses cold evaporation method, widely recognized as the most effective way to humidify, without creating excessive dampness, and avoiding the emission of white dust, ions and ozone Can help provide relief from throat, nasal and skin dryness. It can also help reduce static electricity, moisturize house plants, and preserve musical instruments and wood furniture Auto shut-off Reservoir of 3 gallons Measures 17.7" D x 11.8" W x 13" H 10-year manufacturer's warranty ETL approved Imported Available models: White/LW45W; Grey/LW45G