This high performance powerful portable ventilator fan has been specifically designed for use in automotive, commercial, industrial and agricultural environments. Stale air is rapidly extracted to provide a cleaner more pleasant working environment. Fan Diameter. 12″ (300mm). Air flow 3900m3/h (at optimum efficiency). Rubber feet provide stability and reduce vibration. Carry handle. Motor: 230V, 50Hz, 392W. This product includes the ventilator only, the orange PVC ducting shown in image is sold separately.