The Curvent Pinnacle Ventilator is a natural roof turbine ventilator offering continuous ventilation with no operating costs. The turbine head starts spinning when heat is extracted through the turbine throat. The spinning turbine head, assisted by the wind creates an extraction vortex below that will remove hot stale air from the building. Cool fresh air is then replaced through fixed louvres and other openings at low level, vastly improving working conditions and productivity. The Curvent Pinnacle turbine ventilator is designed to provide permanent ventilation. As an optional extra, a manual ground cable control system can operate winter dampers to shut ventilation. The ventilator is designed to fit any roof profile and is fully waterproof. The Curvent Pinnacle roof turbine ventilator is guaranteed for 5 years and is renowned for its extremely robust construction. Its continuous natural ventilation capabilities requires minimal maintenance, making this ventilator the most cost-effective system to naturally ventilate any building. Available in slope mounted units or ridge mounted units, the low profile construction and curved blades offer appealing aesthetic.