An Anti-down draught cowl is an effective solution for helping to reduce a down draught problem. It ensures the flue gases are released into the atmosphere. In non-problematic weather conditions the flow of gases simply exhaust outwards through the top of the cowl hidden within a cylindrical cover. However in down draught conditions the problematic down draught will enter from the top of the unit and blow downwards towards the base where they meet the exhaust gases and exit through the base helping to reduce the chimney down draught problem. The unit is designed to fit inside your chimney pot. They also incorporate a stainless steel band system to further stabilize the cowl. The Anti-Downdraught Cowl is available for standard 200mm and 225mm Clay pots.