The PL100 110x54mm Cowled Outlet with Non-Return Flap ismanufactured from Polypropylene and has a minimum free area of 5,800mm². It hasa male spigot for connection inside of the System 110 duct. The item isdesigned for installation on exposed external walls where wind or back pressureagainst the ventilation unit are present. The cowled outlet is designed toshield the duct from the wind and deflect the air away. The non-return flapacts as an additional measure to prevent airflow returning through the duct. Asthe fan operates the flap lifts to allow the exhaust air to disperse into theatmosphere. The Outlet is designed for exhaust air only. This item ismanufactured in compliance with Domestic Plastic Ductwork Specification DW/154and does meet UL94HB flammability standard.
