A Roof Ventilator is designed to help exhaust contaminated air from kitchen range hoods up and away from the roof. Filtered supply ventilators help supply filtered make up air in commercial or institutional buildings. Roof ventilation allows air to flow through the attic space, escaping through the roof vents. Properly installed roof vents will prevent the roof from overheating. They also prevent condensation from developing. They are used in all types of commercial, institutional, and industrial buildings in applications from comfort ventilation to manufacturing processes. The offered Roof Ventilator is made available in various sizes and designs as per the need.