The goal of a hot aisle/cold aisle configuration is to conserve energy and lower cooling costs by managing air flow. This involves lining up server racks in alternating rows with cold air intakes facing one way and hot air exhausts facing the other. A containment system can be used to isolate hot aisles and cold aisles from each other and prevent hot and cold air from mixing. Today, vendors offer ducts, partitions, plenums and other commercial options that combine containment with variable fan drives (VFDs) to prevent cold air and hot air from mixing, and use differential airflow or pressure control to balance the flow through at optimal rates. This ensures component temperature control and minimizes the fan and cooling energy required. The EBTRON SERVAIRE® located in a data center containment rack can measure the direction, temperature, and quantity of air flow providing facility managers with the information to control the cooling system to maintain aisle containment.