The Air King AK100LS is a powerful ventilating fan designed for use in bathroom/utility rooms. With a 4-inch diameter duct size, this fan effectively removes excess moisture and odors from the air, ensuring a fresh and comfortable environment. This model features one speed setting, providing efficient airflow of up to 100 cubic feet per minute (CFM) at an efficacy of 4.2 CFM per watt (CFM/W). The sound level is kept at a low 1.0 sone, ensuring quiet operation while maintaining optimal performance. Released on the market in September 2015, the AK100LS by Air King offers reliable ventilation without compromising on functionality. Although it does not include lighting or additional features such as dimming or motion sensing capabilities, this fan excels in its primary purpose of circulating air efficiently. Perfect for small to medium-sized bathrooms or utility rooms, this ventilating fan is an ideal choice for those seeking effective ventilation without any unnecessary frills. Trust Air