A Practical Playbook for CDU Selection

As AI and high-performance computing reshape the data center landscape, traditional air cooling is reaching its breaking point. Racks once limited to 10 or 20 kW are now exceeding 100 kW, with next-generation GPU systems projected to reach over 600 kW per rack within just a few years. This explosive growth is driving operators to rethink how they manage heat, power, and efficiency across their facilities. Liquid cooling has become the only scalable and sustainable solution — offering up to 3,000x greater thermal transfer capacity, cutting total energy use by 30%, and dramatically improving performance-per-watt. But at the center of every successful liquid cooling deployment is one critical component: the Coolant Distribution Unit (CDU). Getting CDU selection right is essential for uptime, cost optimization, and future scalability — and getting it wrong can mean performance bottlenecks, costly retrofits, and operational risk.

This white paper delivers a comprehensive framework for evaluating and selecting the right CDU — one that aligns with your workloads, facility design, and growth strategy.

Inside, you’ll discover:

• Key factors that define CDU performance — including thermal load, flow rates, and head pressure.
• Best practices for scalability, monitoring, and modular design to future-proof your investment.
• Common pitfalls to avoid, from overprovisioning to misleading vendor specs.
• How to vet CDU vendors for reliability, service, and compliance.

Whether you’re upgrading existing infrastructure or designing a new AI-ready facility, this playbook provides the clarity and technical rigor needed to make the right decision — the first time.