04
Natural gas (fuels); electrical energy
11
Heating equipment; heat pumps; heat accumulators; heat
exchangers
35
Advertising, business management, business administration,
professional business consultancy in the energy sector;
wholesale and retail services in relation to electrical
energy, heat and natural gas
36
Financial consultancy with regard to energy services, for
households, commerce and industry; financial services with
regard to the development of integrated energy strategies;
financial consultancy in the energy sector
37
Construction, installation, maintenance and repair services;
shaft and earth drilling services; geothermal drilling
38
Leasing of telecommunications equipment
39
Supplying consumers and commercial users/companies with
electricity, heating and geothermal heat, gas and water;
supply/distribution of renewable and non-renewable energy;
distribution of energy, heating and geothermal heat;
conducting and transporting of electrical energy, heating,
geothermal heat, gas or water; conveying of geothermal heat;
leasing of technical equipment for electricity, natural gas
and energy supplying
40
Leasing of heating installations; generation of power, heat
and geothermal heat
42
Technological consultancy in the energy sector; technical
consultancy in relation to technical research with regard to
the selection of heating installations, technical equipment
for electricity, natural gas and energy supply and
telecommunications equipment; technical consultancy in
relation to technical research with regard to operating
equipment and installations for electricity and gas supply,
and for telecommunications; technical consultancy in
relation to technical research with regard to energy;
technical consultancy in relation to technical research with
regard to the operational management of energy generation
and distribution installations; technical consultancy in
relation to technical research in the energy sector;
scientific and technological services and research;
geological surveys; exploratory drilling for natural gas,
gas or geothermal heat and carrying out the associated
analyses and surveys; research in the field of physics and
geology and geothermal energy; soil investigations