... SC310E3-ACT-00EC exhaust fan1,Energy saving,high efficiency 2,Convenient control 3,Low noise 4,Long life time ... Energy savings : Minimum power consumption & better efficiency than AC equivalent.2.Control : 100% speed controllable, not frequency dependant. Can be ... EC fansFans-tech fans applications:1.IT, telecommunications fans/blowers 2.Automobile fans/blowers, such as bus fan and blowers, small ...