VIVOSUN 6 Inch 440 CFM Inline Duct Ventilation Fan with Variable Speed Controller

Energy-Efficient Ventilation: This blower with a fan speed of 2450 RPM creates an air flow of 440 CFM; It combines the features of both axial and centrifugal fans to achieve optimal ventilation Quiet Operation: The sturdy leather can reduce sound or vibration; Tight and precise construction eliminates rattling; The centrifugal impeller provides powerful airflow and has a low noise of 50 dB Adjustable Speed: This centrifugal fan is equipped with a stepless speed controller to enable the fan to run at different speeds; You can adjust it to the desired airflow level Easy to Install: This duct fan comes with a mounting bracket that the fan can be lifted by rope hangers; Quick installation and easy maintenance by simply removing the locking duct ends Versatile Applications: Ideal for air cleaning and temperature control in industrial, home and garden planting ventilation applications