Household heating systems in the winter and air conditioners in the summer remove indoor air of its natural moisture. The lungs and respiratory tract are dependent on moisture to function effectively. The humidifier provides proper humidity levels to keep your respiratory system moist and helps relieve cold and flu symptoms and irritated and itching skin and eyes. The motor driven impeller draws up water through its pickup tube, then propels the water by centrifugal force against the screen and battle to provide a fine vapor which is released into the room air. At the same time, the exclusive Kaz Dyna filter air cleaning filter removes dust, pollen, odors, and tobacco smoke from the room air, removing 93% of particles as small as pollen.