For spaces up to 860 square feet, the LW45 Comfort Plus Airwasher humidifies dry room air while simultaneously purifying it by removing dust, pollen, pet dander, and other airborne pollutants down to 0.3 microns in size. The digital touch display offers intelligent control, with auto-mode, sleep mode, and convenient service indicators. Once the auto-mode is enabled, the unit will automatically regulate the fan speed based upon the desired humidity level, without over-humidifying the air. Sleep mode will automatically dim the display and reduce the fan speed to allow for a restful night of sleep. This 2.6-gallon humidifier is powerful enough to work with indoor spaces up to 860 square feet, making it ideal for a master bedroom, living room, or large open rooms. Equipped with auto shut-off and low water indicator, this unit also features the ability to select the desired humidity level between 30% to 70% in 5% increments. The LW45 Comfort Plus Airwasher is an eco-friendly evaporative humidifier, which uses extremely low power consumption without the need for filters.