(Used) AC Infinity CLOUDLINE PRO S4, Quiet Inline Duct Fan System with Speed Controller, 4-Inch

Designed to quietly ventilate grow tents, transfer heating/cooling to rooms, circulate fresh air, and cool AV closets. Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming. PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise. Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas. Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball