I love this photograph that I took last year (2007) at the British Telecommunications Rochdale Data Center. It shows such a simple and easy to implement Green initiative that costs chump change and can take 15% off your electricity bill overnight. My colleague and friend Ged McLean of BT is that man who pulled it all together as a technical proof of concept of how to retrofit a 20th Century Data Center with Green Technology.
In case you haven’t worked it out is a contained cold aisle. It prevents the cold air from the raised floor mixing with the hot air coming out of the back of the server cabinets. The clear plastic curtains above the racks combined with blanking plates inside the racks make this a practical outcome.