Possible NAICS Codes
238220 – Plumbing, Heating, and Air-Conditioning Contractors
561210 – Facilities Support Services
236220 – Commercial and Institutional Building Construction
238210 – Electrical Contractors and Other Wiring Installation Contractors
333414 – Heating Equipment (except Warm Air Furnaces) Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
237310 – Highway, Street, and Bridge Construction