Trade-Wind Professional Series in-line blower with 836 CFM. Featuring a galvanized steel housing with a powder-coat finish, Trade-Wind? In-Line Blower is designed to be installed “in-line” with a Trade-Wind? or comparable wood hood liner. This fan is specifically designed to provide efficient, high-velocity air movement by combining the best elements of high flow axial designs with the power of a centrifugal squirrel cage blower. Direct Drive motor construction eliminates the need for continuous belt alignment, tension adjustments and maintenance.