Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; sterilizers; electric heating apparatus; heating installations; apparatus for dehydrating foodstuff organic materials; pasteurisers; drying apparatus; coils (parts of distillation, heating or cooling installations); toasters; roasters; reactors for gas/solid reactions; calcining equipment (other than for experiments and laboratories); pyrolysis equipment (other than for experiments and laboratories)