If you're looking for a silent humidifier, we recommend choosing an ultrasonic humidifier. Via vibrations in the water, the humidifier produces visible mist, which it uses to humidify the room. There are several ultrasonic humidifiers. There are ultrasonic humidifiers that also spread a wonderful scent and there are humidifiers that produce both warm and cold mist. When making your choice, make sure that the ultrasonic humidifier is powerful enough to humidify the room.