I purchased this unit when my old humidifier died. This sucker is so loud, when it's on you can hear it from anywhere in the house, and I have a big house. It roars.I purchased another (different brand) today for another area of the house. It's a 65 pint unit, better temps than the Whirlpool, and it's so quiet you could sit it next to the TV and it wouldn't bother you. It's like night and day between the two units. I would suggest NOT buying the Whirlpool due to the excessive noise. In fact, anyone who would like to buy my unit should contact me. I've got to get it out of the house. I can't take the noise.