Ceiling Ventilator Discharge Direction Horizontal and Vertical Duct Shape Rectangular Housing Finish Galvanized Housing Material Steel Heater Without Heater Includes Backdraft Damper Mounting Brackets Mounting Location Ceiling Maximum Airflow 443 cfm Exhaust Airflow @ 0.100 in SP 413 cfm Exhaust Airflow @ 0.000 in SP 443 cfm Maximum Noise Level 3.5 sones Noise Level @ 0.100 in SP @ 5 ft 3 sones Number of Speeds 1 Overall Depth 18 in Overall Height 14 1/2 in