35
Business consultancy services; business consultancy services in relation to heating, cooling, refrigerating, ventilating and air conditioning apparatus, systems, and controls; consultation in the field of energy efficiency
37
Building construction project management; building construction consulting; air conditioning contractor services; refurbishment of air conditioning plants; installation, maintenance and repair of heating, cooling, refrigerating, ventilating and air conditioning apparatus, systems, controls and component parts thereof; consultancy, advisory and information services in the field of building construction and installation, maintenance and repair of heating, cooling, refrigerating, ventilating and air conditioning apparatus and systems
42
Civil engineering; mechanical engineering; building construction design and development in the field of heating, ventilation and air conditioning technology and energy efficiency; testing or research on machines apparatus and instruments; industrial research in the field of heating, ventilation and air conditioning technology and energy efficiency; consultancy, advisory and information services in the field of heating, ventilation and air conditioning system design technology