... speed controll 4: energy saving and intelligent ECcircular inline fan ECCK100 Technical parameter: TypeVoltageAir flowMax PressureSpeedPowerCurrentNoiseWeightVACCFMPaRPMWAdB(a)kgECCK10023019069045451000.832743.0Technical features ... ventilation system 2: Commercial building ventilation EC circular inline fan ECCK100