Zojirushi Humidifier EE-R50-WA, manufactured in 2014. I reconfirmed its operation in December 2025. I used it for about two winters, but since I moved to a house where the humidity doesn't drop, I haven't used it since and have kept it in storage. I feel that it works without any particular problems. I cleaned it with citric acid. There are still some limescale marks on the bottom. It has a simple structure where the water boils continuously inside, making it a very hygienic type of humidifier. It's similar to a kettle on a stove. There are no filters that can grow mold, so I think it's very good for babies and the elderly.