Best I've used
I've been using this humidifier for years, first as the Slant/Fin.  My doctor wanted me to get it because of its germ-free output and we got two to place in the rooms most used.  I haven't found the noise bothersome.  They do need to be cleaned regularly and should not be allowed to stand with water in them when unused.  We put them away for the summer, but clean them very well first.  We use them 24/hrs a day during the winter and have only had to replace one in the four or five years we've used them.  The one we replaced sat with water in it because of inattention[[ASIN:B000WXYCEA Enviracaire EWM-350 Warm Mist Humidifier]].
Rating: 4 stars