Air extraction
–If the exhaust is ducted into an inactive flue, the air must be expelled parallel to the flow direction of the flue.
Never connect an exhaust hood to an active chimney, dryer vent, vent flue, or room venting ductwork. Seek professional advice before connect- ing an exhaust hood vent to an existing, inactive chimney or vent flue.
–If the ductwork runs through rooms, ceilings, garages, etc. where temper- ature variations exist, it may need to be insulated to reduce condensation. In some cases, a condensate trap may also be required to collect and evaporate any condensate which may occur.
When installing a condensate trap, ensure that it is positioned vertically and if possible directly above the exhaust outlet.
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