The Vornado whole room air purifier actively circulates and filters the entire air in the room. Without strong circulation, the air purifier only cleans the immediate area around the device. The AC350 uses a radial fan to draw in and clean the entire room air – up to a size of 30 m². Thanks to precision engineering, the fan operates quietly despite its strong airflow. The AC350 employs a combination of HEPA and carbon filtration to capture dust, pollen, pet dander, smoke, bacteria, mold spores, dust mites, and more. The carbon pre-filter adsorbs both odors and larger particles. It features 3 speeds, electronic push-button controls, a filter change indicator, and an industry-leading limited 5-year warranty. A true HEPA filter (MD1-0022) and a carbon pre-filter (MD1-0023) are included. This product emits no ozone.