This industry comprises establishments primarily engaged in manufacturing power boilers and heat exchangers. Establishments in this industry may perform installation in addition to manufacturing power boilers and heat exchangers.

Cross-References. Establishments primarily engaged in--

Manufacturing heavy gauge metal tanks--are classified in Industry 332420, Metal Tank (Heavy Gauge) Manufacturing;

Manufacturing steam or hot water low pressure heating boilers--are classified in U.S. Industry 333414, Heating Equipment (except Warm Air Furnaces) Manufacturing; and

Installing power boilers and heat exchanges without manufacturing--are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors.