Rotating spherical and elongated ventilation caps
A wind-driven rotating cap uses the prevailing breeze to create a slight negative pressure at the flue or duct outlet — boosting natural extraction without electricity. The spherical (round) and elongated profiles handle different wind conditions; the elongated cap is typically quieter.
Available in 150 mm and 200 mm with a fixed mounting base. Stainless construction for long outdoor life on a UK roof.



