This UV humidifier is great for large rooms. It creates a visible vapor cloud so you know it's working overtime. It does have lower setting if you don't need it to rain in your smaller room. The large tank hold just about a days worth of water when in high/continuous run mode. It makes zero noise, and has a light to remind you to clean it. It comes off the stand and the electronics detach for easy washing of the parts. THis is one of the best we have owned. It looks nice to. Great buy.