Review on Winix Ultrasonic Cool Mist Humidifier - Premium Whisper-Quiet Humidifying Unit with Automatic Shut-Off, Night Light Function - Lasting up to 30 Hours by Kendra Johnson

Completely silent. Works so well my humidity dropped from 10 to 20 overnight with the bedroom door open. My apartment is 700 square meters, so I bought two. Uses regular water and requires no filter change. But BEWARE, read the cleaning instructions twice. When they say clean, they really mean DRY with paper towels. If even a drop of water gets into the electrical innards, they're spoiled. You need to pour the excess water on the indicated side where it is marked. I also use a cotton swab to further dry the record. There is also a small box that says "Keep out of water". I always stick a dry paper towel in this hole. If you screw up I suggest you air dry for 4 days before returning. I also bought a protection plan.