If it is a full system, then, not only might a "sensitive" person react to the "water treatment", but also a lack of it. In other words, if the Humidifier doesn't have the "water treatment", then it could be broadcasting Molds/Mildew/Spores, that would most certainly cause nausea Just a few thoughts. <G> Regards, Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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