Maintenance of ventilation and air conditioning systems. As well as installation and maintenance in the field of building technology with a focus on sanitary and heating systems. Additionally, in buildings in the area of structural fire protection and all related work. The company can establish branches and subsidiaries in Switzerland and abroad and participate in other companies in Switzerland and abroad. It can acquire, encumber, sell and manage real estate in Switzerland and abroad. It can also provide financing for its own account or for third-party account, as well as provide guarantees and sureties for subsidiaries and third parties.