11 Apparatus for lighting, heating, steam generation, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes, and facilities for gas, heat, cooling and water in connection with the supply of the population, namely heat pumps, heat sinks for use in heating, cooling and ventilating apparatus, heating installations, air-conditioning apparatus and installations, thermostatic valves as parts of heating installations, cooling installations for water, heat exchangers, other than parts of machines