Execution of sanitary, heating and solar systems and all related services, as well as the purchase, sale, trade, holding, rental, leasing and management of real estate. The company may establish branches in Switzerland and abroad, participate in other companies in Switzerland and abroad, take over representations, arrange financing for its own account or for third-party account, provide guarantees and sureties for affiliated companies and third parties, and acquire, encumber, sell and manage operational and business properties in Switzerland and abroad.