Honeywell HCM350B Germ Free Cool Mist Humidifier Black COOL MIST HUMIDIFIER: Add cool moisture to dry air with this quiet humidifier. The 1 gallon tank runs up to 24 hours on low, making this humidifier good for bedrooms & medium sized rooms in your home. UV technology kills 99.9% of bacteria in the water. FILTERED COOL MOISTURE: Evaporative Technology blows moisture off a wicking filter, helping it evaporative into the air quickly. It's not possible to over-humidify with evaporative technology because you can't add more moisture to the air than it can hold. HONEYWELL HUMIDIFIERS: Humidity levels in your home between 40-60% can make the air feel warmer & improve your breathing comfort, sleeping, nasal congestion & dry skin. Dry air can cause static electricity, damage wooden furniture & irritate health issues. Self-regulating evaporative system. Moisture Type: invisible cool moisture HUMIDIFIERS FOR BABIES, CHILDREN, ADULTS: Humidifiers diffuse moisture into the air, and many find that a humidifier for the home, bedroom or nursery becomes an essential part of a good nights sleep when the air is dry, in allergy season, or when sick. HONEYWELL QUALITY: Improve humidity levels in your home & improve your comfort with a Honeywell humidifier. Compare to humidifiers & similar products from Vicks, Crane, Urpower, Holmes, Boveda, Dyson, Evapolar, Aprilaire, Fridgidaire, & Pure Guardian.