Honeywell HCM-300T QuietCare 3-Gallon UV Tower Humidifier Tall, space-saving tower humidifier uses UV technology to treat water and reduce germs by 99 percent Adjustable humidity control with 3 moisture settings; 30 percent quieter than other tower models; runs up to 24 hours per filling Protec antimicrobial treatment helps prevent the growth and migration of mold, fungus, algae and other bacteria Measures 24.6 by 9.8 by 4.3 inches (HxDxW); designed for rooms up to 1050 square feet Uses HAC-504/HAC-504AW replacement filters