Title: Don't waste your time!!
Product review: I bought two of these units and I think they work acceptably. Again, I say acceptably, as in they add just enough humidity. I agree with the other reviews on this item, they are murder to keep clean. Once the calcuim build up starts, you are fighting a losing battle. Also, I just read on the EPA recommendations on humidifiers http://www.epa.gov/iaq/pubs/humidif.html) and I quote "Recent studies by the Environmental Protection Agency (EPA) and the Consumer Product Safety Commission (CPSC) have shown that ultrasonic and impeller (or "cool mist") humidifiers can disperse materials, such as microorganisms and minerals, from their water tanks into indoor air."
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