Low Profile Bathroom Exhaust Fan Discharge Direction Horizontally Duct Diameter 4 in Duct Shape Oval Housing Finish Galvanized Housing Material Steel Heater Without Heater Heater Type Not Applicable Heater Wattage Not Applicable Includes Duct Connector Plastic Damper Mounting Location Ceiling Wall Maximum Airflow 100 cfm Exhaust Airflow @ 0.100 in SP 51 cfm Exhaust Airflow @ 0.000 in SP 50 cfm Maximum Noise Level 1.2 sones Noise Level @ 0.100 in SP @ 5 ft 1.2 sones