Hello. I use this humidifier for about 1 month now and I am very satisfied. Since I heat with wood, the air becomes very dry and fast as we upright piano, its soundboard works strongly because of this drought which implies that the piano is out of tune too quickly. The ideal would be to have the room at 55% humidity. But it's hard to climb, I think it is too small for our room. But it's a great product, very easy to use and its battery life is interesting (about 24 h maximum speed).