According to the high temperature and humidity in greenhouse, individually customize high quality totally enclosed GB motor, to ensure excellent performance. Fan frame all adopt the high quality stainless steel by stretching forming, attractive appearance, no rust. The fixed mount with special adjustable angle design which could change air direction as per requirement. Firmly fixed, stable operation, no swing when start. Air Circulation Ventilation Cooling Fan for Dairy House The blades are all adopt aluminum sheet by punch forming, attactive appearance, light weight, large air voume, lower vibration.