The BGR-552FT-FC is a top-of-the-line fan top unit designed to provide excellent thermal management capabilities for your rack. It comes with a top that has four pre-mounted high-performance fans that provide airflow of up to 552 CFM at a noise level of just 38 dBA. This ensures that your rack stays cool and your equipment stays protected even during periods of high usage. Additionally, the BGR-552FT-FC comes with a controller that allows you to set control points and alarms for added flexibility and convenience. With this controller, you can set the turn-on temperature for fan-controlled models at 75F (24C), 80F (27C), 85F (29C), or 90F (32C), and set the alarm at 95F (35C) or 100F (38F). This allows you to customize the fan settings to best suit your needs and ensure optimal performance. Overall, the BGR-552FT-FC is an excellent choice for those looking for a high-quality fan top unit that provides outstanding thermal management capabilities and customizable control options.