Product review (2 stars): Noisy!
I bought one of these for my wife for Christmas. We used it in our bedroom and found that after a few days it developed a harmonic rattle that was loud enough to disrupt our sleep. i called Venta and they suggested some things which helped, initially, but that rattle kept coming back. I exchanged the airwasher for another thinking it might just be the unit, but the second one developed a similar noise in just a few days. I returned it for a cheaper ultrasonic Venta humidifier and we've been happy ever since.