Genuine energy efficiency in the data centre is elusive. We tend to focus exclusively on PUE as a proxy but of course this is not a measure of overall data centre energy efficiency. What should we be looking at instead and where should the real focus be? Is it the building that is the issue or the load it supports? How do we demonstrate to potential regulators that we are doing the right things, following appropriate guidelines, and minimising our energy consumption? This session will discuss these topics and more to iron out a few misconceptions, answer some of the questions posed and hopefully stimulate responses that can improve the way we address this issue, both as individuals and as a sector.