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Eventually, the air returns to the datacentre through the grilles. The pressure toward the grille end of the datacentre is kept at 5 pascals above the ambient pressure level to ensure that the air makes its way through the datacentre and back toward the servers.
Each of PGS's megacentres has expansion capacity for 100 percent of their current size, Turff said, and expansion for the Weybridge facility will occur once demand scales enough for it to be necessary.
Photo credit: Jack Clark
Want to know more about PGS's 'lunatic fringe' computing? Read ZDNet UK's datacentre tour diary.