The W2E142-BB01-01 is an AC Axial Fan with black-coated die-cast aluminium wall ring, sheet steel blades and open rotor. The W2E142-BB01-01 can mount in any position and it rotates in counter-clockwise direction. 7 Blades "V", Exhaust Over Struts Direction of Air Flow IP22 Protection Rating Class B Insulation Continuous Operation (S1) Mode Maintenance-free Ball Bearings TOP Wired Internally Motor Protection 2.8 x 0.5mm (Operating Capacitor Connected) Blade Terminal Class I Protection 330 or 390m³/Hour Air Flow 2800/3300RPM Speed 52/57dBA Sound Pressure Level Operating Temperature -40 ~ 176°F (-40 ~ 80°C) Material - Frame Aluminum Material - Blade Steel