... speed controll 4: energy saving and intelligent ECcircular inline fan ECCK150 Technical parameter: TypeVoltageAir flowMax PressureSpeedPowerCurrentNoiseWeightVACCFMPaRPMWAdB(a)kgECCK1502305005903030800.6713.4Technical features ... ventilation system 2: Commercial building ventilation EC circular inline fan ECCK150