Roof fans are mounted on building rooftops and are used to exhaust hot air, smoke, or fumes from interior spaces. These fans can be either centrifugal or axial in design, depending on the specific application and airflow requirements. Roof fans are essential in large buildings, warehouses, or industrial facilities to maintain proper ventilation. They are particularly useful in industrial settings where the ventilation of hot, polluted, or humid air is crucial for maintaining air quality and temperature regulation.