HVAC contractor services; air conditioning contractor services; heating and cooling contractor services; installation and repair of air conditioning apparatus; installation and replacement service for heating, ventilating and air conditioning systems; repair and installation of furnaces, hot water heaters, air-conditioners, humidifiers, air-cleaners and thermostats; installation, maintenance and repair of building automation systems, building energy management systems, and temperature control systems; construction consultancy regarding the equipping of buildings, cold storage warehouses, and production facilities for production processes, with cooling units and air-conditioning systems; installation and maintenance of process controls, control systems and thermal components, mechanical systems and compressors; installation and maintenance of power and utility system for others; installation and maintenance of chilled water, hot water, steam, compressed air, water treatment and power generation systems for others; construction project management services, namely, budgeting, constructability reviews, estimation and feasibility studies; building construction services in the field of in commercial, industrial, and construction projects; installation, repair and maintenance of heating equipment, namely, boilers; electrical contracting services; installation and maintenance of HVAC systems; repair and installation services, namely, the installation of heating and cooling air ducts; plumbing services

engineering; engineering design services; industrial design; architectural and engineering services; conducting engineering surveys; consulting in the field of engineering; mechanical engineering