The purpose of a humidifier is to saturate the air with moisture. The devices raise humidity levels in several ways. Manufacturers offer three types of models. Their work is based on different principles: natural evaporation, steam formation and ultrasonic influence on water. These are devices that quickly humidify a room. The heating element brings the water in the tank to a boil, the steam escapes, releasing moisture into the atmosphere. In the room where the device is installed, the temperature will gradually rise and fall as the indicators on the devices are set.