Designing an energy-efficient data centre requires a strategic approach that combines advanced technology with best practices in layout and infrastructure management. The foundation of an energy-efficient design begins with optimising the physical layout, such as implementing hot and cold aisle containment to prevent the mixing of hot and cold air, which significantly reduces the burden on cooling systems. Incorporating energy-efficient hardware, such as servers and storage devices that consume less power, is also crucial. Additionally, leveraging renewable energy sources like solar or wind power can greatly reduce the carbon footprint of the facility. Effective monitoring and management tools are essential for tracking energy use and making real-time adjustments to improve efficiency. By focusing on these elements, a data centre can achieve optimal performance while minimising energy consumption and operational costs.