Bath Exhaust Fan Discharge Direction Horizontal and Vertical Duct Shape Rectangular Housing Finish Galvanized Housing Material Steel Heater Without Heater Includes Backdraft Damper Grille Mounting Brackets Vari-Green EC Motor Mounting Location Ceiling Maximum Airflow 557 cfm Exhaust Airflow @ 0.100 in SP 583 cfm Exhaust Airflow @ 0.000 in SP 604 cfm Maximum Noise Level 9.2 sones Noise Level @ 0.100 in SP @ 5 ft 8 sones Number of Speeds 2 Overall Depth 18 in