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Cooling Distribution Units (CDUs) are a critical component of any direct liquid cooling (DLC) system. They provide the pumping force, thermal control, and heat exchange required to circulate coolant throughout the liquid cooling loop and efficiently transfer heat to either ambient air or the facility water system.
- Industry‑leading cooling density available in both rack‑based and row‑based CDU architectures, supporting the demands of high‑density AI and HPC deployments
- Comprehensive CDU portfolio, including liquid‑to‑air and liquid‑to‑liquid cooling distribution units, enabling flexible deployment across greenfield and brownfield data centers
- Built‑in redundancy and intelligent system controls to ensure reliability, precise flow management, and continuous operation in mission‑critical environments
What To Define Before You Select A CDU
Getting CDU selection right starts with system requirements, not product features. Before evaluating models, confirm:
- Flow and pressure requirements. Your cold plates and manifolds define what the loop demands. The CDU must be compatible with the full chain.
- Deployment model. In-rack for modular, localized control. Row-based for shared infrastructure across AI pods.
- Facility water access. Determines whether liquid-to-liquid or liquid-to-air is the right heat rejection path.
- Redundancy requirements. Mission-critical environments need a defined failure mode. Confirm how your CDU behaves during component service.
- Controls and monitoring integration. A CDU operates as part of your operational layer — confirm it integrates with your existing systems.
Trusted by the best
“As a recognized provider of direct liquid cooling (DLC) technology, CoolIT Systems offers solutions that can enhance energy efficiency and support sustainability goals in high-density environments. Their DLC systems are well-suited for facilities like ours, where advanced cooling options are essential for maintaining performance and reducing environmental impact.”
Chris Larsen
CTO
“CoolIT's DLC technology has helped us revolutionize our approach to scientific computing. It allows us to maintain elevated cooling water temperatures and achieve unparalleled computational density.”
Dr. Alastair Basden
Head of the DiRAC Memory Intensive HPC Service at Durham University and co-chair of the DiRAC Technical Directorate.
“CoolIT and Giga Computing have collaborated for many years, bringing excellent cooling solutions to market and supporting more GIGABYTE DLC ready servers with the latest gen CPUs and GPUs. We are always looking to enhance our server performance and reliability, and that is what CoolIT's products contribute to our IT hardware.”
Vincent Wang
Sales VP at Giga Computing
“Supermicro has a strong and collaborative relationship with CoolIT Systems. Their reliable, scalable cooling solutions complement Supermicro’s high-performance, high-density server systems, particularly for demanding AI and HPC workloads to deliver next-generation performance in data centers.”
Michael Mcnerney
Senior Vice President Marketing and Network Security
FAQs about Coolant Distribution Units
Can I deploy a CoolIT CDU if my data center doesn’t have facility water?
How does CoolIT’s CDU connect to my existing facility water system?
CoolIT’s liquid-to-liquid CDUs include an internal heat exchanger that separates the technology cooling system from the facility water supply. This prevents fluid mixing, protects IT equipment from building-side fluctuations and preserves coolant quality near the servers.
What redundancy is built into CoolIT CDUs?
CoolIT CDUs support redundancy at both the unit and system level. System-level redundancy (deploying multiple CDUs in a shared configuration so that a single unit failure doesn’t interrupt cooling to the rack or pod) is the most common approach in production AI environments. All CoolIT CDUs also incorporate a degree of internal redundancy in their pumping and control architecture. Contact our engineering team to discuss the right redundancy configuration for your uptime requirements.
Are CoolIT CDUs compatible with third-party server platforms?
CoolIT CDUs are hardware-agnostic and deployed today across all major types of liquid-cooled servers and platforms. Whether you’re running OEM servers, custom-built nodes, or a mixed hardware environment, CoolIT’s systems are designed to integrate with the full range of liquid-cooled infrastructure in production today. Contact us for confirmation of compatibility with your specific platform.
Contact Us
Explore our full line of CoolIT CDUs or partner with us for a custom solution engineered to your unique thermal and infrastructure needs.