Trading, assembly and repair of components and building elements, in particular of ventilation systems, ventilation and air conditioning systems, as well as execution of metal construction work. The company may establish branches in Switzerland and abroad, take over the operation of related business activities, participate in companies of all kinds, acquire or sell other companies, take out and grant loans, provide guarantees and other securities, acquire, manage and exploit intellectual property rights, and acquire, manage and dispose of securities and real estate in Switzerland and abroad.