Heat accumulators; Heat pumps; Heat exchangers, other than parts of machines; Storage heaters; Heat generating apparatus.

Consumption-based recording and billing of heating and water costs in buildings; Billing services in the field of energy; Energy price comparison services; Tracking and monitoring energy consumption for others for account auditing purposes; Arranging of contracts in relation to energy supply; Administrative assistance and consultancy relating to business management for companies in the energy sector; Assistance and consultancy for natural persons and undertakings in matters relating to energy management; Vehicle fleet (business management of a -) [for others].

Financial affairs; Investment services; Credit agencies; Housing management; Management of land; Mortgage brokerage services; Wealth management; Financial management; Evaluation of heating costs; Financial consultancy in the energy sector; Consultancy concerning financing of energy projects; Brokerage of financial investments in energy companies.

Building construction, repair, namely fault rectification in electrical installations and in energy generating installations; Installation, cleaning, maintenance and repair of electrical installations and wires, pumps, heating systems, district heating pipes, steam pipes and gas pipes, and of other devices for supplying, transporting and distributing electrical energy, renewable energies, gas, district heating and steam; Construction and maintenance of installations for waste incineration and for generating electrical energy, renewable energies, biogas, district heating and steam; Construction, cleaning and maintenance of installations for producing renewable energies; Construction, maintenance and upkeep of street lighting; Installing of telecommunications networks; Repair of telecommunication machines and apparatus; Updating of computer networking and telecommunications hardware; Repair and maintenance of computer and telecommunications hardware; Installation and repair of waste water pipes; Cleaning and renovation of waste water pipes.

Telecommunication services; Telecommunications consultancy; Telecommunications consultancy; Telecommunications consultancy; Interactive telecommunications services; Internet based telecommunication services; Fixed line telecommunication services; Optical fibre telecommunications services; Electronic communications services; Transfer of data by telecommunications; Transfer of data by telecommunications; Information about telecommunication; Rental of telecommunications routers; Telecommunication services; Communication services by radio; Rental of telecommunication equipment; Rental of telecommunication facilities; Consultancy in the field of telecommunications; Operation of telecommunications systems; Mobile telephone communication services; Rental of telecommunications lines; Telecommunications services between computer networks; Telecommunications services provided by means of optical fibre networks; Telecommunications services using cellular radio networks; Operation of wide-band telecommunications networks; Telecommunications by e-mail; Automatic transfer of digital data using telecommunications channels; Internet access services; Information services relating to electronic communication networks; Telephone telecommunications services provided via prepaid telephone calling cards; Digital network telecommunications services; Information about telecommunication; Providing telecommunications access to server centres; Rental of telecommunications apparatus and installations; Providing of telecommunication connections for data centres; Rental of telecommunication devices and equipment enabling connection to networks; On-line information services relating to telecommunications; Information about telecommunication; Telecommunications routing and junction services; Rental of telecommunication equipment including telephones and facsimile apparatus; All of the aforesaid services in the field of supplying energy, water and telecommunications and not relating to the broadcasting of television, radio, music or other audiovisual content.

Supply of electricity, heat, gas or water to consumers; Storage of fuel gas using green electricity; Storage, transport, conducting, distribution and supply of energy, in particular electrical and thermal energy, of district heat, of alternative energies, in particular solar energy, energy from hydropower, energy from wind power, energy from biomass, renewable energies, and of gas, gaseous fuels and water; Transport of gases and liquids, in particular natural gas and liquefied natural gas by means of pipelines; Transportation of waste; Clearance of waste; Transportation of waste; Rental of containers and receptacles for collecting materials and waste; Automobile vehicle renting services.

Energy production; Production of electricity; production of long-distance heating; Production of energy, electricity and heating by heating installations in independent devices and objects; Operation of a virtual power plant (cluster power plant) by means of interconnecting decentralised power generating units, including photovoltaic installations, hydropower plants, biogas plants, wind energy plants and combined heat and power plants, at locations of all kinds to form a network; Operation of hybrid networks (sector-coupled energy systems) for supplying energy through coupling in the sectors of electricity, heat supply and traffic; Waste water treatment; Treatment of gas, in particular natural gas and town gas; Treatment of water, in particular drinking water and service water; Operation of power plants; Recycling of valuable materials; Incineration and destruction of waste; Consultancy relating to the incineration of waste and trash.

Energy consultancy, Consultancy relating to the efficient use of energy, heat and natural gas; Thermography services; Development of integrated energy concepts; Planning of power plants and heating plants for generating power and heat, of supply networks for distributing power, heat and gas, and of household technology installations for private customers; Monitoring of telecommunication signals; Testing of telecommunication signals; Programming of telecommunications software; Technical design and planning of telecommunications networks; Engineering services, Physics [research], Chemist services, Engineering surveying, technical consultancy and providing of expertise; Preparation of data processing programmes, Data processing for others, for a fee; Quality audits.

Telecommunications services, electronic mail services, providing user access to the Internet.

Electronic publishing services, sporting activities.