Bionaire Digital Ultrasonic Tower Humidifier, 3 Gallon, Black (BUL7933-UM)

These are the best humidifiers I've ever owned. I've bought three over the years, so I can have one in different parts of the house. I've used only distilled water which I think helps keep them working. Years ago when I had a problem with the cap on the first one I'd bought, I called the company asking to buy a replacement cap. While at that time a replacement caps were not being sold, they instead sent me a complete replacement unit ... free of charge. I had been so pleased with that first unit that I would have been happy to pay for a replacement cap. Getting a complete unit replacement for free was far more than I expected. What a great company! By the way, I think that cap I needed to replace may have been damaged (i.e., the rubber gaskets) because I'd added bleach to the distilled water I'd been using. So I don't do that anymore.

The Bionaire Digital Ultrasonic Tower Humidifier was on sale, big discount. The unit I received was obviously a return, but it works perfectly. It maintains 33% humidity in a 150 sq. ft. room where the humdity with radiator heating was in the 5-10% range. I fill it every 12 hours; filling is easy with a half gallon recycled jug. The tank unit releases and reseats easily, but it does not have a flat base, and it is a bit heavy when full, so I set it on the couch when filling it. This humidifier is quiet, makes an occasional burble.