This U.S. industry comprises establishments primarily engaged in manufacturing attic fans and industrial and commercial fans and blowers, such as commercial exhaust fans and commercial ventilating fans. Manufacturing air-conditioning units (except motor vehicle)--are classified in U.S. Industry 333415, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing; Manufacturing motor vehicle air-conditioning systems and compressors--are classified in U.S. Industry 336391, Motor Vehicle Air-Conditioning Manufacturing; Manufacturing household-type fans (except attic) and portable air purification equipment--are classified in U.S. Industry 335211, Electric Housewares and Household Fan Manufacturing; and Manufacturing stationary air purification equipment--are classified in U.S. Industry 333411, Air Purification Equipment Manufacturing.
