Data centres are buildings dedicated to housing computer systems and associated components, such as telecommunications and storage devices. In recent years, sustainability concerning energy use in data centres has become a growing concern. In Singapore, studies done by the National Environment Agency in 2010 estimated that the total electrical energy usage of data centres is 3.6 percent of Singapore’s total electrical energy consumption. The energy consumption demand of data centre buildings is estimated to grow to 2,260 GWh by 2015, which is a 51 percent increase over 5 years. This suggests that energy consumption by data centres in Singapore has been increasing and will continue to increase in the years to come. Data centres expend large amounts of energy and generate an immense amount of heat at the same time. In fact, ventilation systems can account for up to 35 percent of energy use in data centres and energy used by fans contributes to a large portion of this statistic. There are many ways to ventilate a data centre. As there is no standard in the design of data centres, the design of ventilation systems within them vary as well.