The 2011--2012 renovations replaced the four elevators, added a new cooling tower, got rid of lots of asbestos, and added an emergency generator.<ref>http://enr.construction.com/bonus_regions/midatlantic/2012/1210-virginia-tech-ambler-johnston-hall-renovation.asp</ref> The generator is probably diesel and rated at a few hundred kilowatts (given its size). It's located just outside the service lot, across from the covered bike racks and surrounded by a [[Hokie Stone]] wall with gates. It's probably there for [[Schiffert]] more than anything else.

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