This U.S. industry comprises establishments primarily engaged in manufacturing heating equipment (except electric and warm air furnaces), such as heating boilers, heating stoves, floor and wall furnaces, and wall and baseboard heating units. Manufacturing warm air furnaces--are classified in U.S. Industry 333415, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing; Manufacturing electric space heaters--are classified in U.S. Industry 335211, Electric Housewares and Household Fan Manufacturing; Manufacturing household-type cooking stoves and ranges--are classified in U.S. Industry 335221, Household Cooking Appliance Manufacturing; Manufacturing industrial, power, and marine boilers--are classified in Industry 332410, Power Boiler and Heat Exchanger Manufacturing; Manufacturing industrial process furnaces and ovens--are classified in U.S. Industry 333994, Industrial Process Furnace and Oven Manufacturing; and Manufacturing commercial-type cooking equipment--are classified in U.S. Industry 333319, Other Commercial and Service Industry Machinery Manufacturing.
