The AUPU AV11A3 Ventilating Fan is a high-quality fan designed for use in Bathroom/Utility Room environments. It has a 4 inch diameter duct size, ensuring efficient airflow throughout the room. This model, manufactured by AUPU, boasts a sleek design and reliable performance. With its single speed setting, this fan provides a powerful airflow of 110 cubic feet per minute (CFM). Its efficacy rating of 4.4 CFM/W ensures energy efficiency while effectively ventilating the space. The sound level is minimal at only 1.1 sones, ensuring quiet operation. This Ventilating Fan does not include lighting features but focuses solely on providing exceptional ventilation capabilities. Its compact design makes it suitable for various installation locations within your bathroom or utility room. Released on July 10th, 2018, this model incorporates advanced technology to deliver optimal performance. While it doesn't offer additional features such as dimming or motion sensing capabilities, its primary function as