The Air King AK80H is a ventilating fan designed for use in bathroom and utility rooms. It has a 4-inch diameter duct size, providing efficient airflow of 80 CFM (cubic feet per minute) at a sound level of 0.9 sones. With its powerful performance, this fan effectively removes excess moisture and odors from the air, creating a comfortable and fresh environment. This model features one speed setting, ensuring simplicity in operation. The unit does not include lighting capabilities but excels in its primary function as a ventilation device. Released on October 1, 2015, by the renowned brand Air King, the AK80H offers reliable performance and durability. Although it lacks specific details such as power factor or efficacy ratings for different airflow rates, this fan's overall efficiency can be estimated with an efficacy rating of 2.9 CFM/W (cubic feet per minute per watt). Additionally, it does not incorporate any advanced features like dimming or motion