I'm not an HVAC engineer but Bitfury's layout with separated hot/cold aisles looks very different from GAW's. I find it hard to believe they would be able to vent half a megawatt from that aisle they were standing in.
Edit: I was referring to this picture:
http://i.snag.gy/WE5Kk.jpgYes, it's not exactly the same, but the concept is pretty much the same. Use a large open warehouse and rather than using chillers to cool everything, you just displace the hot air from the racks and vent it like in that picture of the Bitfury data center. They have large fans at the top of their warehouse to vent the hot air out of rather than using chillers.
Certainly not saying that it's legit, just plausible that what they are showing is actually their data center for their miners.
