Title: Quiet, except for an occasional glub-glub-glub.
Product review: I like this humidifier. I would buy it again. It is made well, and we are into our second season with no problems. However, I think it is fair to warn prospective buyers about two things: (1) Although the fan is very quiet, it does make a glub-glub-glub sound every hour or so when the water is released from the tank. We were concerned that it would keep us awake at night, but we both sleep through it. A more sensitive sleeper might have trouble. (2) It takes longer to fill the tank through the narrow opening than other humidifiers we have.
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