#2 The specification for the Neff cooker hood D64QFM1NOB quotes Pipe diameter 150mm (120mm enclosed). What does this mean? What is the diameter of the exhaust spigot? Do I need to buy a 150mm or a 120mm internal diameter exhaust pipe.
Round pipes: An inner diameter of 150 mm, but at least 120 mm, is recommended.
Flat ducts:The inner cross-section must correspond to the diameter of the round pipes.
dia. 150 mm ca. 177 cm2
dia. 120 mm ca. 113 cm2
■ Flat ducts should not have any sharp deflections.
■ Use sealing strips for deviating pipe diameters.