The AUPU AV08A1 Ventilating Fan is a high-quality fan designed for use in Bathroom/Utility Room settings. It has a 4-inch diameter duct size, ensuring efficient airflow throughout the room. With its sleek design and brand reputation of AUPU, this model offers excellent performance and durability. This ventilating fan features one speed setting, providing a consistent airflow of 80 CFM (Cubic Feet per Minute) with an efficacy of 4.7 CFM/W (Cubic Feet per Minute per Watt). This ensures effective ventilation while maintaining energy efficiency. With a sound level rating of only 0.4 sones, this fan operates quietly, allowing you to enjoy peace and tranquility in your space without any disturbance. Although it does not include lighting capabilities or additional special features such as dimming or motion sensing, it excels at its primary function - effectively ventilating the air in your bathroom or utility room. Overall, the AUPU AV08A