4
Natural gas
11
Heating equipment
35
Advertising, business management, business administration, energy services, namely energy consultancy with regard to professional business matters; Professional business and organisation consultancy in the energy sector
36
Leasing of heating installations, technical equipment for electricity, natural gas and energy supplying, and telecommunications equipment; energy services, namely energy consultancy with regard to financial matters, for households, commerce and industry, development of integrated energy concepts with regard to financial matters; financial consultancy in the energy sector; providing of finance
37
Installation and maintenance of heating installations; installation and maintenance of technical equipment for electricity, natural gas and energy supplying, and telecommunications equipment, for others, installation and maintenance of energy generating and distribution installations
38
Operating and rental of telecommunications equipment; telecommunications
39
Supplying consumers with electricity, heating, gas or water, delivery of renewable and non-renewable energy; distribution of energy
40
Electricity generation
42
Energy consultancy with regard to technical matters; technical consultancy with regard to the selection of heating installations, technical equipment for electricity, natural gas and energy supplying, and telecommunications equipment; civil engineering services; engineering with regard to building site development, the supplying, installation, maintenance and operating of heating installations, technical equipment for electricity, natural gas and energy supplying, and telecommunications equipment, and with regard to the supplying of renewable and non-renewable energy; technical consultancy with regard to operating equipment and installations for electricity and gas supplying, and for telecommunications; energy management, namely technical consultancy, planning and technical consultancy with regard to the operational management of energy generating and distribution installations; technical consultancy in the energy sector; scientific and technological services and research