11 Heating apparatus, namely, space heating apparatus, electric heating apparatus, namely, space heating apparatus, heating installations, in particular floor heating apparatus, heating elements, heating plates, namely, hot plates, radiators, central heating radiators, and radiant heaters, namely, wall and ceiling radiators; ceiling radiator profiles being structural parts of radiators; heating installations, in particular wall, ceiling and floor heating; coils being replacement parts of heating and cooling installations; steam generating installations, steam accumulators, pressure water tanks being hot water tanks, heat accumulators, air heaters, air filters for ventilating apparatus and furnaces, air conditioning filters, water filters; heat pumps, heat regenerators being heat generators, heat accumulators, heat exchangers, other than parts of machines, hot water apparatus being hot water tanks, hot water heating installations, heating boilers, feed devices being structural parts for heating boilers, connecting fittings being structural and replacement parts for radiators and heating installations; solar thermal collectors, and heating installations consisting predominantly of solar collectors and structural and replacement parts therefor; air ventilation apparatus and instruments and air-conditioning installations, and structural and replacement parts for ventilation and air-conditioning installations, namely, ventilation apparatus and fans, air-cooling apparatus, air-filtering installations, filters for air conditioning; thermostatic valves being structural and replacement parts of heating installations and pressure regulators for water installations, valves which are structural and replacement parts of installations for heating, thermostatic valves; regulating and safety fittings for thermostatic valves being structural and replacement parts and for heating installations