The world's coolest data centers

Data centers gobble up energy and generate heat, but here are some data centers that try to do it with their own flair

Iron Mountain Data Center, Butler County, Pa.: Built in a limestone mine, this experimental data center room cools equipment directly into the limestone, which can absorb 1.5 BTUs per square foot. Because of this absorption, the test room uses no cooled raised flooring, and it directs heat through ceiling panels and blows it across the roof of the shafts to cool. The facility also uses water from an underground lake to cool. The goal is to determine the site's geothermal properties and take advantage of them to save money.

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