The operation of a company active in the field of ventilation, carrying out in particular all types of maintenance, cleaning and assembly work. The company can establish branches and subsidiaries in Switzerland and abroad and take participations in other companies in Switzerland and abroad as well as carry out all operations that are directly or indirectly related to its corporate purpose. The company can acquire, mortgage, sell and manage real estate. It can proceed with financing for its own account or for the account of third parties as well as grant guarantees and securities to its subsidiaries and to third parties.