Apparatus and equipment for heating, steam generating, drying, ventilation, sanitary installations, air conditioning installations, heaters, heating apparatus, radiant heating systems, hot-air apparatus, heating apparatus for solid, liquid or gaseous fuels, thermostatic valves (parts of heating installations), heating elements, heating plates, expansion tanks for central heating, ventilation equipment, air conditioning fans, apparatus and equipment for ventilation, in particular ventilation units, assembled air handling units, whether or not with heat recovery, fans as parts of ventilation apparatus, in particular electric and combined, ventilation (heat recovery) units, heat recovery units, air conditioning installations and air conditioning apparatus, infrared heating.