Standard cooling occurs from under a raised floor environment into a containment unit. Our primary cooling system uses chilled water in an N+1 Configuration, and passive cooling technology via heat exchanger. Secondary cooling comes from Computer Room Air Conditioning Units (CRAC) located outside the data hall. Flexibility in our model allows for either cold aisle or hot aisle containment systems, and precision in-row cooling with either N+1 single feeds or A&B feeds, with or without standard room control.
ADC puts all of its CRACS outside of the data hall allowing maintenance to happen without people having access to the data hall. This is just another security measure in place for customers.