PSC 4420 Heat Exchangers and Steam Condensers

Federal Category 4.3: Facilities & Construction Facility Related Materials

Possible NAICS Codes
332410 – Power Boiler and Heat Exchanger Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
238220 – Plumbing, Heating, and Air-Conditioning Contractors
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
333999 – All Other Miscellaneous General Purpose Machinery Manufacturing
423730 – Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
423720 – Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
333618 – Other Engine Equipment Manufacturing
221330 – Steam and Air-Conditioning Supply
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance