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The entire datacentre sits inside a large warehouse
Each of the modules ZDNet UK saw were stacked on top of one another inside Colt's 100,000-square-foot warehouse (pictured).
The exterior of the modules contained the chilling systems, which drew in cold air coming in through grills in the warehouse's shell. The cooling is predominantly achieved through free-air cooling, though there is a direct-expansion cooling system running as backup.
The direct expansion cooling system operates for less than 300 hours a year (12.5 days), according to Ruddock, kicking in when the temperature threshold goes above 27° or when air humidity goes above 70-percent relative humidity.
Photo credit: Jack Clark
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