PROCOOL SP480TV-E / 2U Temperature Controlled Silent Rack Fan/Airflow= EXHAUST/Home Theater AV Cabinet Cooling Broadcast Server Recording Studio Rack Fan 2U 2 rack spaces / 19" x 3.5" x 2" / Airflow= EXHAUST at 212 CFM - Noise= 45 dBA High airflow, high pressure fans / First choice for server applications. Best for any application where high airflow and pressure are needed. The fan controller monitors temp and starts and stops the system at user defined set point. Select from Intake or Exhaust. Fans can be easily flipped over to change airflow if needed. 2 Year Warranty - Built by hand in the USA