Quiet Care Air-Washing Humidifier features a Protec antimicrobial treated filter system with ionizer that washes air to capture dust, dirt and pollen as it humidifies. Protec Cleaning Cartridge helps reduce mineral buildup, and the Protec Extended Life Filter helps prevent the growth of mold and odor-causing bacteria on your filter. HCM-6009 humidifies up to 2300 square feet. Design includes automatic shutoff, adjustable humidity control, and three moisture output settings. Space-saving design fits into corners. Humidifier holds 9 gallons that last up to 24 hours per filling.