What is use of Cowl head ventilator?

A cowl head ventilator is used in buildings to enhance natural ventilation by allowing air to flow freely while preventing rain and debris from entering. It functions by rotating with the wind, creating a low-pressure area that draws stale air out and facilitates fresh air intake. This type of ventilator is commonly used in industrial and agricultural settings to improve air quality and reduce moisture buildup. Additionally, it can help in regulating temperature and reducing energy costs associated with mechanical ventilation systems.