... mm, tongue and groove structure, made by 0.426mm colour steel with polystyrene(EPS) inside, colour: optional (red, orange, ... exhaust air from rear side direction, quadrate steel frame, outside is coated steel, inside is galvanized steel, colour: optional10) Intake and exhaust air ... RIELLO RG5S oil burners, 260000 Kcal/pc, 2 stainless steel heat exchangers, 2 electric dampers from spraying to baking ...