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No Fan, No Motor: How Does This Mysterious Device Spin on Factory Roofs?
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News18•03-10-2026, 19:25
No Fan, No Motor: How Does This Mysterious Device Spin on Factory Roofs?
- •The rotating circular object on factory roofs is called a 'turbo ventilator' or 'wind-powered ventilator'.
- •It operates without an electric motor, using wind to spin its curved blades and facilitate air movement.
- •Its primary function is to expel hot and polluted air from factories or warehouses, allowing fresh air to enter.
- •Turbo ventilators improve ventilation by removing stale air, not by cooling it, and are common in industrial buildings.
- •Their design prevents rainwater from entering, with curved blades and a specific structure that diverts water away.
Key Questions Answered
The rotating metal object is called a turbo ventilator or wind-powered ventilator, and its primary function is to help expel hot and polluted air from inside factories and warehouses.
A turbo ventilator operates entirely with the help of wind. It is equipped with several curved blades that catch the airflow when the wind blows, causing the entire device to spin without needing any electrical switch.
Rainwater does not easily enter because of the ventilator's specialized design, which includes curved blades and a structural top part that prevent water from falling straight down while still allowing air to escape.
