The "2-in-1" Venta® Airwasher humidifies and purifies indoor air simultaneously. There are no filters that need to be replaced; water serves as the filter. This model uses very low power consumption, operating at 8 watts of energy or less. The LW45 can accomplish this in a room up to 800 square feet, making it ideal for larger bedrooms, offices, living rooms, and family rooms. It operates using the cold evaporation method, widely recognized as the most effective way to humidify, without creating excessive dampness, and avoiding the emission of white dust, ions, or ozones. The Venta Airwasher 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. Dimensions 17.7" x 11.8" x 13". Two-year warranty. ETL approved. Imported.