2 of 6Image
The datacentre has a power usage effectiveness (PUE) rating of 1.7, though Rackspace hopes to lower this to an average of 1.59 once the third data hall is built.
Cooling is achieved via computer room air-conditioning (Crac) units that pass cold air through the underfloor plenum. The current is then lifted into the servers and expelled as hot air at the back. Unlike numerous other datacentres, the racks are not enclosed.
"If we were to box in the cold aisle, it wouldn't give us particularly good efficiency," Gary Boyd, the datacentre operations manager for the facility, said. He explained that Rackspace's use of Crac units means the facility has the air mix in the open areas at the top of the servers. External cooling coils are used to provide cool air when the exterior temperature is below 14°C.
Photo credit: Jack Clark
See more of ZDNet UK's datacentre tour.