Planning, execution and maintenance of building technology systems, in particular heating, ventilation, air conditioning and sanitary systems, as well as the provision of related services. May establish branch offices in Switzerland and abroad, participate in other companies in Switzerland and abroad, acquire or merge with similar or related companies, and enter into all transactions and conclude contracts that are suitable to promote the purpose of the individual company or are directly or indirectly related to it, may acquire, manage, encumber and sell properties, intellectual property rights and licenses of all kinds.