Sales of articles for household and heating technology, in particular cold storage, heat storage and related products, installation and service of such systems, operation of an engineering office for heating, ventilation, air conditioning, refrigeration, sanitation and other building technology systems, as well as provision of facility services for the maintenance and preservation of buildings, systems and infrastructure. The company may establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, acquire or establish similar or related companies, acquire, encumber, sell and manage real estate in Switzerland and abroad, acquire, sell and manage copyrights, patents and licenses, provide financing for its own account or for third-party account, and grant guarantees and warranties for subsidiaries and third parties.