... . Life: 50000hou Our axial fans with external rotor are able to work with condensing and evaporating units with 4 to 16 fins per ... IP552.CL.B or CL.F3.Life at 25C: 50000hours4.Blade dia: 200,250,300,350,400,450,500,550,600 ... set to 35 degrees9.Bearing system: Ball bearing Axial fan with frame