A computer room air conditioning (CRAC) unit is a device that monitors and maintains the temperature, air distribution and humidity in a computer room or data center. As more equipment is squeezed into IT spaces, it is more important than ever to ensure that each component of the support infrastructure is operating at maximum efficiency and reliability. The failure of a CRAC unit can lead to downtime, which of course means a loss of service and that can translate into a loss of money and often times a loss of customers.