Air conditioning apparatus; air conditioning installations; heat recovery ventilators; air-conditioning, air cooling and ventilation apparatus and instruments; interior environment control system for commercial buildings, namely, heaters, ventilators and humidifiers all sold as a unit; air filtering installations; steam generators; drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; filters for air conditioning; dampers, namely, control devices used in ventilating installations to regulate flow of air; electric fans; cooker ventilation hoods; ventilation fans for the prevention of fire being parts of smoke vent systems; ventilation exhaust fans; component parts of the aforesaid apparatus and installations

Building construction; installation of apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, air-conditioning, ventilating, heat recovery, air filtering and water supply, of sanitary installations, air filters as well as parts and accessories of the aforesaid apparatus and installations; repair of apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, air-conditioning, ventilating, heat recovery, air filtering and water supply, of sanitary installations, air filters as well as parts and accessories of the aforesaid apparatus and installations; maintenance of apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, air-conditioning, ventilating, heat recovery, air filtering and water supply, of sanitary installations, air filters as well as parts and accessories of the aforesaid apparatus and installations; construction consultancy

Research in the field of ventilation, air conditioning and heating apparatuses and installations; services of a designer for the design of ventilation, air conditioning and heating apparatuses and installations; design and development of computer hardware and software in the field of HVAC systems for heating, ventilation and air conditioning; construction drafting; engineering services; technological research consultancy in the field of developing ventilation, air conditioning and heating apparatuses and installations; preparation of reports, namely, conducting scientific feasibility studies of ventilation, air conditioning and heating apparatuses and installations; design and development of heating, air-conditioning, ventilating, heat recovery, and air filtering apparatuses and installations, and air filters; material testing; scientific research and development services; development of new products; writing of computer programs