**BEWARE** It ran perfectly for about 3 months, then just stopped. I had to send back to SPT for repair with was $24 shipping on my part. They sent back another one-not mine that had a rusted cleaning brush, and water all inside. When plugged this up, the motor was extremely loud--can't sleep with it on. The mist volume would not change even on low humidity-only runs on high no matter how humidity is set. I am not going to send it back in for another $24 in shipping. I will just purchase another product-The Crane Drop works great, only no warm mist. I am chalking this up as I will NOT purchase another SPT product. Ended up throwing away! Piece of garbage!!