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Review title: Plastic Humidifier
Product review: I was surprised to find these humidifiers were plastic, as metal would be better to conduct heat to warm the water to evaporation levels. The hooks would only have been able to grab on a round metal edge running left to right while most radiators aren't built that way, including mine and I could not use these at all. Until someone comes out with some good old fashioned metal types like we used to have, I will pass on this "new" style. Therefore, until then, these are a very good advertisement for electric humidifiers, of which I just bought two.
