Possible NAICS Codes
238220 – Plumbing, Heating, and Air-Conditioning Contractors
561210 – Facilities Support Services
236220 – Commercial and Institutional Building Construction
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
333415 – Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
238210 – Electrical Contractors and Other Wiring Installation Contractors
238990 – All Other Specialty Trade Contractors
236210 – Industrial Building Construction
238290 – Other Building Equipment Contractors