Ducting
The ducting used must be fire retardant 125mm (5”) in diameter. If possible duct through the wall at
the rear of the canopy or wall cabinet. 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 recommended a maximum length of 3m, to be installed, to be reduced 1m for each 90° bend installed in the ducting run. If the distance is greater than 3m the efficiency of the hood could be impaired.
A flange spigot of a
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 hood ducting (extraction version) must never be connected to central heating flues, radiators or water heaters etc.
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