AC Infinity RAXIAL S4, Inline Booster Duct Fan 4 with Speed Controller

A duct fan designed to increase existing airflow in HVAC systems and ventilate home spaces like attics and workshops. | Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application. | Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow. | AC shaded-pole induction motor utilizing balanced steel blades and permanently lubricated ball bearings. | Duct size: 4 | Dimensions: 7.28 x 3.95 x 3.95 in. | Airflow: 106 CFM | Noise: 28 dBA | Bearings: Dual Ball