Provision of services in the field of building technology, in particular provision of work in the areas of ventilation and air conditioning systems and sale of related goods. Furthermore, the company provides construction services of all kinds, in particular renovations, conversions and new buildings. The company may establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, and conduct all business that is directly or indirectly related to its purpose. Additionally, it may acquire, encumber, sell and manage real estate in Switzerland and abroad, also arrange financing for its own account or for the account of third parties, and provide guarantees and sureties for subsidiaries and third parties.