Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; sauna heaters (sauna stoves), electric sauna heaters (sauna stoves), steam generators, water heaters, steam baths, sauna bath installations, bath installations, showers, shower cubicles, bath tubs; ventilating louvers, vents and ventilation dampers as parts of air conditioners, ventilators