The planning, execution, repair and maintenance of installations in the field of sanitary facilities, heating systems, burners and tanks, ventilation systems, air conditioning, water supply systems, water and air treatment, swimming pools, insulation in general, building and industrial sheet metal work, waterproofing of flat roofs and terraces with tar or synthetic materials, heat pump systems, refrigeration and fire protection systems. The management of a technical office, the direction of works within the aforementioned purposes, the provision of consulting services. The company may participate in other companies and may construct, acquire, hold, manage and sell real estate in Switzerland.