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INSTALLING THE COOKER HOOD
Before tightening the screws completely it is possible to adjust the frame by turning it. Make sure that the screws do not come out of their seats in the slotted holes. � The frame mountings must be secure to withstand the weight of the hood and any stresses caused by the occasional side thrust applied to the device. On completion, check that the base is stable, even if the frame is subjected to bending. � In all cases where the ceiling is not strong enough at the suspension point, the installer must provide strengthening using suitable plates and backing pieces anchored to the structurally sound parts.
Extraction
The cooker hood is more effective when used in the extraction mode (ducted to the outside). Venting kits may be purchased through your retailer or DIY store, and must be ducted to an outside vent of �125mm (5�) or �150mm (6�). For the best performance use the shortest possible duct run and the minimum number of bends. Where �exible ducting is �tted 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 3 metres with one bend, to be installed, to be reduced metre for each 90o bend. If a distance is greater than 3 metres the ef�ciency of the hood could be impaired. The ducting used must be manufactured from fire retardent material conforming to the relevant British Standard or DIN 4102-B1. When the cooker hood is ducted to the outside the charcoal �lter must be removed.
