For spaces up to 300 square feet, the Venta LW15 Airwasher humidifies dry room air while simultaneously purifying it by removing dust, pollen, and other airborne pollutants down to 10 microns in size. The Venta Airwasher is both a filter-free evaporative humidifier and filter-free air purifier, all in one lightweight unit. By implementing the principle of humidifying and purifying air for homes and offices without the use of filters, the Venta Airwasher is hygienic, simple to use, and easy to clean. Properly humidified air will help eliminate static electricity and work to preserve wooden furniture and musical instruments. Venta Airwashers offer the consistent performance of high-end German engineering; delivering perfect indoor air quality with both humidified and cleaner air to breathe. This compact 1.4-gallon capacity humidifier is powerful enough to work with indoor spaces of up to 300 square feet and is designed to resist over-humidifying your space.