Providing technical support, namely, technical advice concerning the installation, repair and maintenance of electric or electronic apparatus, equipment and devices used for automated or partly automated industrial operations; building and facility operations in the nature of machinery installation, maintenance and repair; building and facility maintenance services, namely, building maintenance and repair; installation, maintenance and repair of heating, ventilation, and air-conditioning equipment; maintenance and repair of the physical equipment and computer hardware comprising energy systems in buildings and industrial facilities; installation, maintenance and repair of the physical equipment and computer hardware comprising heating, ventilation, and air-conditioning systems; installation, maintenance and repair of fire safety equipment; installation, maintenance and repair of the physical equipment and computer hardware comprising environmental controls for buildings, building automation systems, and building security systems; installation, repair and retrofitting of building automation and control systems hardware; maintenance of building equipment; consulting services in the field of maintenance and repair of buildings and industrial facilities; installation, maintenance and repair of the physical equipment and computer hardware comprising electrical, mechanical, environmental and sanitary systems in buildings and industrial facilities; building construction services; consulting in the field of building construction

Engineering services, namely, mechanical engineering, electrical engineering and plumbing engineering; consulting services in the fields of mechanical engineering, electrical engineering and plumbing engineering; custom design and engineering of process controls for HVAC systems; custom design and engineering of process controls for building systems in the nature of mechanical, electrical and plumbing engineering services; data automation and collection services using software to evaluate, analyze, and collect service data; design of process control systems in the nature of mechanical, electrical and plumbing engineering services; engineering services for energy-efficient building construction, retrofitting, repair and maintenance in the nature of mechanical, electrical and plumbing engineering services; engineering consulting services for the development, implementation and operation of process controls in the nature of mechanical, electrical and plumbing engineering services; technical support services, namely, troubleshooting of industrial process computer software controls; remote monitoring of the functioning and use of electrical equipment, namely, HVAC equipment, HVAC control systems and HVAC machinery