Bathroom Fan, Discharge Direction Horizontal, Duct Diameter 4 in, Duct Shape Round, Housing Material Steel, Heater Without Heater, Includes Automatic Backdraft Damper, Mounting Location Ceiling, Exhaust Airflow @ 0.100 in SP 50 cfm, Maximum Noise Level 0.5 sones, Noise Level @ 0.100 in SP @ 5 ft 0.5 sones, Maximum Coverage Area 45 sq ft, Number of Speeds 1, Overall Depth 9 1/4 in, Overall Height 5 3/4 in, Overall Width 10 in, Lighted Without Light, Phase 1