Fan size: 1380mm×1380mm×450mm Frame: Hot galvanized sheet, high anti-corrosive durability, sheet thickness1.0mm, zinkthickness 275g/M2 Motor: Simens motor, Other motor accordingly, CE certificate Motor technical data: 1.1 Kw 380 V 50 Hz three phase Motor RPM: 1440r/min Noise: low than 65db Blade : diameter: φ 1270 mm Blade No.: 6 Blade material: Mirror face stainless steel, avoid dust accumulation Blade RPM: 460r/min Blade instruction: Weight difference between blades is less than 0.5k,blades will go through balance test after assembled which can assure steady running and even airflow. Shutter : Centrifugal system opening, spring close system, shutter can be opened at 90 degree. Shutter No.: 10 Thickness of shutter : 1.5 mm , others 0.8 mm others: Belt: Mistuboshi belt Housing: galvanized Airflow: 44000m3/h