As rack densities climb, driven by virtualisation, high-performance computing and AI workloads, cooling has become one of the biggest operational challenges in any data centre. It is also one of the largest contributors to energy cost.
Choosing the right approach depends on density, space and budget. There is no single best answer, but there is almost always a more efficient option than the one in place today.
The Main Cooling Approaches
Air cooling with hot and cold aisle containment remains the most common setup. Simple containment, blanking panels and good cable management can deliver noticeable efficiency gains with very little investment.
In-row and rear-door cooling bring cooling closer to the heat source and suit medium to high-density racks where room-level air conditioning struggles.
Liquid cooling, including direct-to-chip and immersion systems, is increasingly used for the highest-density AI and HPC deployments where air alone can no longer remove enough heat.
Small changes such as containment and raising supply air temperatures often deliver the quickest return on investment.
Hardware Choices Matter Too
Modern, efficient servers and storage produce more work per watt, which reduces the cooling load before any infrastructure changes are made. Consolidating older equipment onto fewer, more efficient platforms is often the first step we recommend.
