I'm glad somebody finally gave this a try. There was a discussion in a much older thread (can't remember where, or when - too lazy to search) about this same topic. The conclusion by some was that the piezo-misting would not work at all, mistakenly comparing this mist with the vapor produced by heating-element humidifiers. The piezo-misters are readily available with attached reservoir, and can be found at most stores - they're sold as humidifiers. These piezo humidifiers consume in the neighborhood of 12 liters or so every 24 hours.
As a note, the atomization and subsequent evaporation of water results in a very fine particulate which consists of the dissolved mineral content in the water. This, like all fine particulates, has been identified as a health risk (silicosis, I think). The only way to avoid this is to use distilled water. Soft water will reduce this white dust, but not eliminate it.
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