11 Heating, steam-generation, cooking, cooling, drying, ventilation and water pipe installations as well as sanitary installations; solar collectors; floor heating systems; flat and tubular collectors; solar ovens; solar accumulators; heat pumps; heat accumulators; heat exchangers; fittings; faucets, namely level control valves for containers; boiler tubes and fittings for floor heatings; shower cubicles; bath tubs and shower tubs made of plastics as well as the respective equipment thereto, namely fittings, ventilators;