Honeywell Cool Moisture Humidifier HMC-350B (black) Ultra Violet Germ-Free The Honeywell HMC-350B Germ-Free Cool Mist Humidifier brings fresher cool mist to your home. It kills 99.99% of mold, fungi, and bacteria in the water! Great for medium-sized rooms Runs up to 24 hours per filling (1.1gal tank) Dishwasher safe tank