Commercial Fan, Discharge Direction Horizontal and Vertical, Duct Diameter 8 in, Duct Shape Round, Housing Finish Not Applicable, Housing Material Galvanized Steel, Heater Without Heater, Heater Type Without Heater, Heater Wattage Not Applicable, Includes 8-Way Adjustable Mounting Brackets, Mounting Location Ceiling, Maximum Airflow 310 cfm, Exhaust Airflow @ 0.100 in SP 315 cfm, 324 cfm, Exhaust Airflow @ 0.000 in SP 334 cfm, 343 cfm, Maximum Noise Level 2.5 sones