Unpowered Fan
An unpowered fan is a device that uses the natural wind speed to drive the fan's turbine to rotate, and uses the principle of indoor and outdoor air convection to accelerate and convert any parallel air flow into a vertical air flow from bottom to top, so as to improve the indoor ventilation effect.
A non-powered fan utilizes the natural wind speed to propel the fan's turbine and, by leveraging the principle of indoor and outdoor air convection, accelerates any parallel air flow and transforms it into a vertical, bottom-up flow, thereby improving indoor ventilation. This fan requires no electricity, is silent, and can operate continuously. Based on the natural laws of air and the principles of airflow, it is optimally positioned on the rooftop to rapidly expel heat and contaminated air, improving the indoor environment.