A humidifier is a device that adds moisture to the air via a fine mist. There are different types of humidifiers, including cool mist, warm mist, and ultrasonic. Vaporisers basically do the same ...
In the same small bedroom where I tested the Dreo HM311S, the Pure Enrichment humidifier raised the moisture in the air by 2% within 10 minutes and 5% in one hour on low mist, and the humidity ...