Planning, installation and servicing of building technology systems, trading in goods of all kinds, operation of a business for heating installations, sanitary work, pipeline construction and oil-fired heating systems. May participate in other companies, acquire, manage and sell properties, securities and license rights, take out and grant loans, provide guarantees and other securities, establish branches in Switzerland and abroad, participate in similar or related businesses, acquire or establish such businesses, buy and sell properties, and acquire and exploit industrial property rights and know-how.