Provision of services in the field of energy supply, planning, execution, installation of systems and work in the field of energy and building technology, specifically heating systems, ventilation and boilers, as well as execution of related repair work, trade in various products in the aforementioned areas. May establish branches 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 company or are directly or indirectly related to it, acquire, manage, encumber and dispose of real estate, intellectual property rights and licenses of all kinds.