All MUB(A)/T fans have impellers with backward curved blades, manufactured from Galvanised Iron, and IEC standard motors for all 400V three phase motors. Motors are outside the air stream. The casing consists of an aluminium frame with fiberglass reinforced plastic / aluminium corners and double skin, galvanised steel panels with a 20 mm mineral wool insulation. Panels are removable, allowing flexible ventilation solutions. The MUB(A)/T bottom panel is shaped as a grease tray and incorporates a premounted drain plug. Standard execution, seen 100°C in airflow direction: service door left, top outlet.