Design, construction and maintenance of heating, sanitary, climate, refrigeration and ventilation systems, including planning and trade in appliances. The company may establish agencies, branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, and conduct all business and conclude contracts that are suitable to promote the company's purpose or are directly or indirectly related to it. Furthermore, it may acquire, manage, encumber, rent and sell real estate, patents, licenses and rights of all kinds, also provide financing for its own account or for the account of third parties, and grant guarantees and sureties for subsidiaries and third parties.