Detailed Product Description Duct fan1.exhaust round fan 2.various size for choice3.adopt wind power engineering theory, strong wind, low noise, durable motor.Be suitable for workshop, warshouse, restaurant and so on. It can be sunstroke prevention and reduce the temperature, ventilating and improve the environment.ModelSizeVoltage/frequencyPowerMotor statorSpeedFQ-25 10"250220V/380V/50HZ100W88* ...