Provision and brokerage of services in the areas of ventilation, air conditioning, sanitary and heating systems, civil engineering and construction, as well as building and special cleaning services. The company may establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, acquire, encumber, sell and manage real estate in Switzerland and abroad, provide financing for its own account or for third-party account, and grant guarantees and warranties for subsidiaries and third parties.