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Extraction
The charcoal filters are not required in this mode and should be removed.
Ducting
The ducting used must be 150mm (6ins), or 125mm (5ins) in diameter. If possible duct through the wall immediately above the canopy. For the best performance use the shortest possible duct run and the minimum number of bends. Where flexible ducting is fitted it should not be turned through very tight bends as this may impair the performance of the hood. It is recommenmded a maximum length of 3 metres, to be installed, to be reduced by 1 metre for each 90o bend installed in the ducting run. If the distance is greater than 3 metres the efficency of the hood could be impaired. The diameter of the spigot on top of the hood is 150mm (6ins). A ducting adapter from 150mm (6ins) to 120mm (5ins) is supplied together with a 120mm to 125mm ducting collar. If the room where the cooker hood is to be used contains a fuel burning appliance such as a central heating boiler, then its flue must be of the room sealed or balanced flue type. If other types of flue or appliances are fitted ensure that there is an adequate supply of air to the room. The cooker ducting (extraction mode) must never be connected to central heating flues, radiators or water heaters etc.
