Corten steel roof extractor Corrosion Resistance: It protects itself by forming a stable patina that prevents further oxidation. Reduction of electrochemical corrosion thanks to the porous external layer and the waterproof internal layer rich in copper, chromium and phosphorus. Tensile Strength: High mechanical resistance, higher than that of traditional steel. Durability: Longevity and less need for maintenance. Resists up to 700° C - Even in the event of a fire in the chimney 8 year warranty Up to 3800 M³/h (equipped with 6-speed regulator) Product certified in accordance with CE law Universal (for any type of flue, even irregularly shaped ones)