... speed controll 4: energy saving and intelligent ECcircular inline fan ECCK200 Technical parameter: TypeVoltageAir flowMax PressureSpeedPowerCurrentNoiseWeightVACCFMPaRPMWAdB(a)kgECCK20023070555021501401.0734.5Technical features ... ventilation system 2: Commercial building ventilation EC circular inline fan ECCK200