Providing services in the field of building technology, in particular planning and execution of sanitary, heating and ventilation systems, planning, project management, execution and controlling of heating, cooling, ventilation, sanitary and electrical systems for buildings of any kind, providing planning and execution of roofing and flat roof works as well as trading with building materials of all kinds. Can establish branches in Switzerland and abroad, participate in other domestic and foreign enterprises, acquire or merge with similar or related companies, and enter into all transactions and conclude contracts that are suitable for promoting the purpose of the company or are directly or indirectly related thereto, furthermore acquire, manage, encumber and dispose of real estate, intellectual property rights and licenses of all kinds.