I recently had the opportunity to discuss an application for a retrofit containment system installed into an existing data center with a sales person. Not an uncommon story, given the effectiveness of separating cold and hot air streams in the data center to reduce cooling energy consumption. The part of the story that stood out for me was that the sales person enthusiastically related how the end user realized an instant payback on the containment system and had money left over. It sounded too good to be true. My first thought was just how badly is this data center being operated that the retrofitting of a containment system would yield an instant payback and still have money left over???