Review on 🌬️ Advanced Ultrasonic Warm and Cool Mist Humidifier H5450BCA by Pure Guardian - UVC Technology, 100 Hours Runtime, Large 2 Gallon Tank, Covers up to 380 Sq. Ft., Whisper-Quiet Operation, Filter-Free Design, Mold-Resistant Treated Tank, Includes Essential Oils Tray by Wensheng Dunbar

Had to return it. "). I mean it's big but if it worked properly I'd be happy as it has MEGA full features and has water to humidify a BIG room for a long time. One of the few humidifiers that does both offers both hot and cold steam, AND Uses sterilization UV light to kill mold in steam and humidifier Cons: It hums while working as expected, but the problem isn't the hum, it's random changes in volume/intensity/ Frequency at unpredictable intervals so it's like hummmmm for a few seconds and then GUMMMMMM! for 4 minutes then a buzz for 2.4 minutes then BRRRRRRRZZMMMMMM for 2 minutes etc. If only a constant type of noise were made, the tone /Intensity wouldn't change at every random moment, I or my sick kids could easily fall asleep A little noise from our newest humidifier actually helped me to fall asleep en, but this one didn't help we make sense. It was cleaned and made sure it was completely dry before being sent back in its original packaging with no missing parts. Took Kolya in a box with a label that I printed out and got my money back with no problem. Maybe it was broken, otherwise I would have liked to keep it.