SunStream Inline Duct Fan with Speed Controller for Grow Tent Ventilation Heating and Cooling Exhaust ETL Certified by SunStream Save 13% $79.99 $69.99 4 inch - $69.99 6 inch - $79.99 4 inch 6 inch 4 inch 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Size : 4 Inch 203 CFM; noise level: 48dB; 120 Volt standard household plug; pre-wired 5 feet power cord Size : 6 Inch 460 CFM; noise level: 50 dB; 120 Volt standard household plug; pre-wired 5 feet power cord About this item Multi-purpose use for exhaust, air supply, and indoor temperature control, can be mounted at any angle in any point along the ductwork. Galvanized steel case and components for enhanced resistance again rust，ideal for various commercial code and residential applications. Precisely assembled Fan motor and blades eliminated rattling and prolonged its useful life, it is capable of operating in air stream temperatures up to 176℉/ 80℃. Fan motor bearing is sealed, self-lubricated for maintenance-free life. Fan speed is controllable with included speed controller.