Bionaire BCM7207-U Cool Mist Humidifier with Comfort Tech Cool mist humidifier for medium room sizes from Bionaire; with Comfort Tech for automatic humidity adjustments Enhanced by Arm & Hammer baking soda, antimicrobial filter tray resists bacteria growth and foul odors Digital humidistat with push-button output selection; runs 36 hours per full water tank Quieter than other humidifiers; dishwasher-safe tray for cleaning convenience Humidifier weighs 9 pounds upon shipping; limited warranty