FWIW... I first tried one of the ultrasonic models and it was terrible; leaked, needed constant cleaning, left white dust everywhere. I switched over to an evaporative, top-fill model and could not be happier. Only downside is that it uses filters, but I get a few months from each one so it's not a huge cost. This is the one that I'm using for a small room. NFI, just love the humidifier... https://www.honeywellstore.com/store...te-hcm-710.htm