it is quite and has a big tank. I let it run for days.
Excellent, powerful, sleek design.
This is by far the best humidifier I have ever purchased. It works well and blows out a very strong stream of cool vapor. The design is nice. It doesn't have that "medical" look that other humidifiers have *** . I've only owned this unit for a week, so as far as build up of lime, or whatever hard water has, I cannot comment. Highly recommend.