The Philips PureProtect Water 3400 Series AC3421 is designed to enhance indoor air quality while providing effective humidification. With its multifunctional capabilities, this air humidifier and purifier operates with a maximum humidification capacity of 15.6 L per 24 hours, ensuring that the atmosphere remains comfortable and healthy. The device features a robust filtration system which includes a HEPA filter, pre-filter, and active carbon filter, collectively working to deliver clean air efficiently at a Clean Air Delivery Rate (CADR) of 300 m3/h. Equipped with night light and sleep mode for added convenience, it operates quietly with a sound pressure level of only 51 dB(A).