A green data centre case study highlights how implementing sustainable practices can lead to significant environmental and financial benefits. In one example, a data centre achieved substantial energy savings by integrating renewable energy sources such as solar and wind power into its operations. Additionally, the facility utilised advanced cooling technologies, including free cooling and liquid cooling systems, which drastically reduced the reliance on traditional, energy-intensive air conditioning. The implementation of hot and cold aisle containment systems further optimised airflow, minimising energy waste. Through these initiatives, the data centre not only reduced its carbon footprint but also realised considerable cost savings, demonstrating that sustainability and efficiency can go hand in hand. This case study serves as a model for other facilities aiming to transition towards greener, more energy-efficient operations.