3433  Heating Equipment, Except Electric and Warm Air Furnaces

Establishments primarily engaged in manufacturing heating equipment, except
electric and warm air furnaces, including gas, oil, and stoker coal fired
equipment for the automatic utilization of gaseous, liquid, and solid
fuels. Establishments primarily engaged in manufacturing warm air furnaces
are classified in industry 3585; cooking stoves and ranges are classified
in industry 3631; boiler shops primarily engaged in the production of
industrial, power, and marine boilers are classified in industry 3443; and
those manufacturing industrial process furnaces and ovens are classified in
industry 3567.