Hessaire 48″ belt drive box fan 48x750s-n, 1hp, 1ph, 19210 cfm, with shutter hessaire incorporates industry leading fan, motor and blade design capabilities in all air movement products. Hessaire’s galvanized box fan line features heavy gauge g90 galvanized components for long life and harsh environments, heavy gauge galvanized wire guards, and sealed ball bearing ag duty motors. Industrial grade fan blades are matched with the motors for maximum efficiencies, airflow and motor life. Each box fan includes a hanging bracket as well as eyebolt holes in the cabinets for hanging options. For models with discharge shutters, shutters feature heavy gauge extruded aluminum components. Louvers are counterbalanced for optimum performance.