Miele DA 6690 D Product Manual - Page 46

Exhaust duct WARNING: Danger of toxic fumes. Gas cooking appliances release car‐ bon monoxide that can be harmful or fatal if inhaled. To reduce the risk of fire and to prop‐ erly 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 "IMPOR‐ TANT SAFETY INSTRUCTIONS" to reduce the risk of personal injury. Follow all local building codes when installing the hood.  Only use smooth pipes or flexible duct hoses made from non-flamma‐ ble materials for exhaust ductwork.  To achieve the greatest possible air extraction with the lowest noise lev‐ els, please note the following: - The diameter of the exhaust duct should not be less than 6" (150 mm). - If flat exhaust ducts are used, the cross section should not be smaller than that of the exhaust connector. - The exhaust duct should be as short and straight as possible. - If elbows are needed, make sure they have a large radius. - The exhaust duct itself must not be kinked or compressed. - Make sure that all connections are secure and airtight. Remember that any constriction of the airflow will reduce extraction per‐ formance and increase operating noise.  If the exhaust duct is to be routed through an outside wall, we recom‐ mend installing a telescopic wall vent or a rooftop vent (available as an op‐ tional accessory).  If the exhaust air is to be conducted into a vent flue, the intake piece must be aligned with the flow direction of the flue.  When installing the exhaust duct hor‐ izontally, you must slope it away from the source by at least 1 cm per meter (3/8" per 3 1/4'). This ensures that condensate cannot drain back into the ventilation hood.  If the exhaust duct is to be routed through rooms, ceiling space etc., the temperatures in these different areas may differ greatly, which means that the problem of condensation will need to be addressed. The exhaust duct will need to be insulated. 46