This Johnson Controls FR5/6 VSD fan assembly is a high-quality product designed for efficient ventilation in various applications. It features a variable speed drive (VSD) that allows for precise control of the fan speed, resulting in optimized airflow and energy savings. The FR5/6 design ensures reliable performance and durability, making it suitable for both residential and commercial use. With its advanced technology, this fan assembly provides quiet operation while effectively circulating air to maintain a comfortable environment.