AtmoE 13-7/8″ x 13-7/8″ bathroom exhaust fan

Features

• Three fan control speed settings (100, 130, 150 CFM) with standard 6" (152 mm) air duct. CFM will vary with 4" (102 mm) air duct
• Lowest speed operates at a whisper-quiet 0.4 sones with standard 6" (152 mm) air duct and at 0.6 sones with 4" (102 mm) air duct
• Fits standard bathroom exhaust fan cutouts to make upgrading easy
• 6" to 4" duct reducer ensures airflow efficiency by creating connection between air duct openings of two different sizes