Scientifically proven to hydrate dry air for a healthier environment. The only humidifier to deliver hygienic, even humidification in winter and high-velocity air to cool you in summer. Intelligent Climate Control: Dyson humidifier use intelligent Climate Control to measure both the temperature and the moisture in the air. Kills 99.9% of bacteria: Ultraviolet Cleanse technology kills bacteria before mist and hydrated air evenly and quietly. Sleep timer and up to 18 hours of continuous use. Night-long comfort: Projects hygienic mist and hydrated air evenly and quietly. Dual function for year-round use: Delivers hygienic mist and hydrated air evenly in winter and high-velocity air to cool you in summer. Whole room hydration: Project hydrated air evenly throughout the room. Patented Air Multiplier technology: Generates long-range mist projection to distribute air evenly.