Miele DAR 1220 Set 4 Operating instructions/Installation instructions - Page 10

Air extraction ,WARNING Danger of toxic fumes. Gas cooking appliances release carbon monoxide that can be harmful or fatal if inhaled. To reduce the risk of fire and to properly exhaust air, the exhaust gases extracted by the hood should be vented outside of the building only. Do not vent exhaust air into spaces within walls or ceilings or in attics, crawl spaces or garages. To reduce the risk of fire, only use metal ductwork. Please read and follow the "IMPORTANT SAFETY INSTRUCTIONS" to reduce the risk of personal injury. Follow all local building codes when installing the hood. Exhaust ducting and connections - The ducting should be as short and straight as possible, and the number of sharp bends should be minimized. - For most efficient air extraction, the diameter of the ductwork should not be less than 8" (203 mm) for DRIB/DREB XL and 10" (254 mm) for DRIB/DREB XXL. Use of flat ducts also reduces the air extraction efficiency. - Noise levels of the hood will increase if flat ducts or round ducts of less than than 8" (203 mm) for DRIB/DREB XL and 10" (254 mm) for DRIB/DREB XXL in diameter are used. - Use smooth or flexible pipes made from approved non-flammable materials for exhaust ducting. - Where the ductwork is horizontal, it must slope away from the hood at least 1/8" per foot (1 cm per meter) to prevent condensation dripping into the appliance. Important If the ductwork runs through rooms, ceilings, garages, etc. where temperature variations exist, it may need to be insulated to reduce condensation. 10