Holmes HAP2914 Hepa Air Purifier For closed room up to 186 square feet; three speeds; 360-degree air intake True HEPA filter at least 99.97% effective; prefilter reduces odors Removes smoke, pollen, dust, animal dander, dust mites, molds, bacteria, viruses Separate ionizer helps remove second-hand smoke Portable; 10-1/2 inches high, 16 inches front-to-back""