VIVOSUN 8 Inch 720 CFM Inline Duct Fan with Variable Speed Controller for Ventilation EFFECTIVE VENTILATION: Powerful blower with a fan speed of 2450 RPM for an air flow of 720 CFM. Moves air through your target location efficiently for optimal ventilation LOW NOISE LEVEL: Durable plastic fan housing and blades for extremely low noise; Variable speed controller for easy fan speed adjustment. EASY INSTALLATION: Removable duct ends with locking tabs for quick removal and easy maintenance and a cord length of 5.9 feet for hassle free setup. VERSATILE APPLICATIONS: Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control. NOTE: Comes with an installation bracket indicating the direction of the airflow. Max Ambient Temp is 104 / 40