Bathroom Fan Discharge Direction Horizontal Duct Diameter 4 in Duct Shape Round Housing Material Steel Heater With Heater Heater Type Infrared Lamp Heater Wattage 250 W Includes Adjustable Mounting Brackets Quiet Plastic Damper Squirrel Cage Plastic Blower Wheel Mounting Location Ceiling Exhaust Airflow @ 0.100 in SP 70 cfm Maximum Noise Level 4 sones Noise Level @ 0.100 in SP @ 5 ft 4 sones Maximum Coverage Area 65 sq ft Number of Speeds 1 Overall Depth 8 1/8 in