Dreo Showdown: Tested Cool Mist Power vs Noise Woes in Large Nurseries We recently tested the Dreo 3L humidifier in a spacious nursery, impressed by its top-fill design and 360° nozzle coverage. The cool mist was versatile, keeping both babies and houseplants comfortable without overdoing it. While we appreciate that the humidifier detects ambient humidity and adjusts output, its 30-hour runtime felt slightly underwhelming for large spaces. However, the 26dB quiet operation was a standout—so quiet we barely noticed it during the night. The built-in night light was a thoughtful touch, dimming subtly to avoid disrupting sleep. Though we’d love a bit more run time, the Dreo excels in balancing power, noise reduction, and practical features for nurseries or home use. It’s not a perfect humidifier, but it’s a strong contender for those seeking comfort without disturbance.