This air cleaner filters the air five times per hour in a room up to 365' sq. A HEPA filtration system captures 99.97% of 0.3 micron particles, including allergy-provoking pollen grains, dust mites, mold spores, tobacco smoke, and pet dander. The device has a Clean Air Delivery Rate (CADR) of 240 for removal of tobacco smoke, pollen, and dust. Filtered air is discharged diffusely, resulting in near whisper-quiet operation. The filter is easily accessed and replaced through the front panel, the four-speed fan is controlled with a turn of a dial, and the casters allow ease of maneuverability. Includes one filter. 23" H x 20" W x 11" L. (34 lbs.)