Size of the fan: Φ200mm Number of impeller blades 9 Nominal Voltage: V AC 230/400(50/60Hz) Voltage Range: V AC 60...430 Nominal Speed: min-1 1370...2900 Max. flow rate: m3/h 450...1000 Max. flow rate: CFM 265. 5...590 Noise free air: d B(A) 42...62 Power consumption: W 72 Impeller material Sheet steel (stove-enameled in black) Bearings: Maintenance-free ball bearings Energy saving, without electronic motor noise, 100% speed controllable, integrated process controller. Electrical motor: with external rotor shaded-pole motor. Resume heat automatically protection and off point: 140centigrade. Expected service life: 400 VDB; -25 to +85C; 30, 000 hrs.; Class A 450 VDB; -25 to +85C; 10, 000 hrs.; Class B Applications: Air conditioning, refrigeration, ventilation, drying, cooling Mass: g 1500