Advisory services relating to the installation of heating and cooling apparatus; Advisory services relating to the installation of plumbing; Advisory services relating to the maintenance of plumbing; Advisory services relating to the repair of plumbing; Building construction; Building construction and repair; Construction services, namely, planning, laying out and custom construction of commercial buildings; Construction of modular buildings; Construction of facilities, buildings, factories, manufacturing plants; Construction planning; Consultation in building construction supervision; Installation and repair of heating, ventilating and air conditioning equipment; Maintenance of HVAC systems, equipment, process piping, plumbing installations, refrigeration systems, and building automation control systems

Engineering; Consulting in the field of mechanical engineering; Custom design and engineering of HVAC, mechanical, process piping, ventilation, plumbing, and building automation control systems; Engineering design services; Engineering services in the field of HVAC, mechanical, process piping, ventilation, plumbing, and building automation control systems; Industrial design services; Mechanical engineering; Planning and layout design services for HVAC, mechanical, process piping, ventilation, plumbing, and building automation control systems in facilities, buildings, factories, and manufacturing plants