Installation of heating and sanitary systems, provision of services in other areas, construction work, execution of new buildings, conversions, repairs and renovations in residential and commercial construction, assumption of construction management as well as all direct and indirect activities in this context as general contractor or subcontractor. May establish branches in Switzerland and abroad, take over related business operations, participate in other companies, acquire or sell other companies, acquire, manage and sell or exploit intellectual property rights, securities and real estate, trade in goods of all kinds and conduct all business.