Detailed Product Description exhaust fan *Low noise rolling bearing,and it has a long service life*High-quality,low weight,novel outlook,easy for install*Utillizes CAD optimized design for blade,air flow stable and low noise*Suitable for ventilation in factory,residence,office,hotel and entertainment places etc Introduction To FunctionsModelmmVPhaseHzWr/minm3/mindB(A)FA-202002201503513501245FA- ...