Bionaire BCM7204-U Smart Touch Cool Mist Humidifier Cool mist humidifier for medium room sizes from Bionaire; with ECC for automatic humidity adjustments Enhanced by Arm & Hammer baking soda, antimicrobial filter tray resists bacteria growth and foul odors Electronic control with push-button output selection; runs 30 hours per full water tank Quieter than other humidifiers; dishwasher-safe tray for cleaning convenience Humidifier weighs 9 pounds upon shipping; limited warranty