Possible NAICS Codes
238220 – Plumbing, Heating, and Air-Conditioning Contractors
561210 – Facilities Support Services
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
236220 – Commercial and Institutional Building Construction
334290 – Other Communications Equipment Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
238210 – Electrical Contractors and Other Wiring Installation Contractors
332410 – Power Boiler and Heat Exchanger Manufacturing
561990 – All Other Support Services