Philips air humidifier fights dry air with high efficiency and hygiene. It spreads 99% fewer bacteria compared with ultrasonic humidifiers. Prevents white dust or wet desktop. This Philips air humidifier offers a three-stage advanced evaporation system with NanoCloud technology. * Stage 1: the absorbent filter on the humidifier catches big particles such as human/pet hair and dust when drawing in the dry air. * Stage 2: the advanced evaporation system with NanoCloud technology humidifies the air by adding water molecules to the air and does not carry bacteria or scale. * Stage 3: healthy air gets blown out of the humidifier at a constant speed, delivering comfortable, healthy humid air without formation of water mist in your home. **Comfortable humidity** Evenly distributes humidified air around you. Lets you breathe healthy humidified air at home and at the office providing comfort for your skin. **Dual humidification speed** Choose between silent and standard humidification to allow maximum flexibility. **Easy-to-clean design** Cleaning humidifiers inside and out – especially the water tank – has never been easier. **Easy-to-fill water tank** 2 ways of filling water tank: you can bring water in a cup and fill the tank locally after removing the tank's top cover or you can take the water tank to the closest tap in your home.