No electricity, no maintenance, no electricity, automatic exhaust throughout the day will also reduce the occurrence of fires and a lot of other unnecessary troubles caused by short circuits or voltage overloads for you. High-quality stainless steel material, non-energy power fan, strength enough to withstand 200 km/h wind speed, 100KG load capacity, heavy pressure without damage or deformation. Position the stainless steel roof wind turbine vent cover on the roof to achieve optimal airflow. Then ensure the vent is securely fastened to the roof to prevent any leaks. It has a wide range of applications, which is very suitable for farms, breeding farms, inrial plants, cargo warehouses, chimney tops, and is used without electricity, reducing more trouble. It efficiently removes stale air from the room whilst preventing rainwater from entering the ventilation system., Manufacturer: YKMYXZ