Air-O-Swiss Refurbished 7133 Ultrasonic Humidifier - Warm and Cool Reviews

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It has everything the ad said. An adjustment for hot or cool, easy to use and clean. Excellent product for apartment living, very slim and sleek design. Does not make noise.

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For those who are new to ultrasonics, WHITE MIST! All ultrasonic humidifiers atomize the water with the calcium included in the mist (or sodium with softened water). Many make attempts to pre-filter the water to prevent this, but all have failed. This calcium mist gets everywhere and eventually creates a white dust-like covering on everything.

So knowing this, if you spend long time periods in dry hotels, this is for you. Quiet, easy to use and let the maid clean up the mess. :-)

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Nice humidifier. Puts out lots of cool mist or not...it's up to you to regulate the amount of moisture you want to put out. Good idea on the water filter purifier incorporated in the cool mist.