This air cleaner filters the air five times per hour in a room up to 580' sq. A three-stage 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 375 for removal of smoke, dust, and pollen. Filtered air is discharged diffusely from vents that are six times larger than the average air cleaner's, resulting in no noticeable draft. The filters are easily accessed and replaced through the top panel, the three-speed fan is controlled with a turn of a dial, the casters allow ease of maneuverability. Includes three filters. 26" H x 20" W x 13" D. (35 lbs.)