The Venta LW25 Humidifier humidifies dry room air in spaces up to 40 square meters (with standard 2.5-meter ceilings) using evaporative humidification. As a disk stack rotates in the water reservoir, clean water evaporates to humidify the air in your space. This cold evaporation process is recognized as the best humidification method. Properly humidified air will also eliminate static electricity as well as work to preserve wooden furniture and musical instruments. Venta Humidifiers offer the consistent performance of high-end German engineering; delivering optimal indoor air quality with properly humidified air to breathe. This compact 7-liter capacity humidifier is powerful enough to work with indoor spaces of up to 40 meters, perfect for a living room or master bedroom, and is designed to resist over-humidifying the interior.