Improving energy efficiency in data centres is essential for reducing operational costs and minimising environmental impact. Several key measures can be implemented to enhance efficiency, starting with optimising airflow management through the use of blanking panels, which prevent the recirculation of hot air and ensure that cool air is directed precisely where it’s needed. Upgrading to energy-efficient hardware, such as servers and storage devices with lower power consumption, is another important step. Additionally, adopting advanced cooling techniques, such as liquid cooling or free cooling, can significantly reduce the energy required to maintain optimal temperatures. Monitoring tools that track power usage effectiveness (PUE) allow for real-time adjustments to improve efficiency further. These measures not only lower energy consumption and costs but also contribute to a more sustainable and resilient data centre operation.