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Rosenberg EC backward curved impeller, GKHR 315-CIB.100.4EC IE, input voltage 100-130 volt (390 watts), 1-phase, 50-60 hz. includes: IP54 and UL-R motor Class F with soft start, 1840 rpm maximum, speed control possible with open or closed loop (0-10v, PWM, MODBUS, potentiometer (potentiometer non included)), operating temperature -25°C to +40°C at full speed, 2 separate connection cables (power & control); very high efficiency impeller made of aluminum.