Global 4U Rack-based CDUs Market Strategic Research Report

Scope of the Report

The global 4U Rack-based CDUs market size is predicted to grow from US$ 344 million in 2025 to US$ 1,145 million in 2032; it is expected to grow at a CAGR of 18.8% from 2026 to 2032.

Coolant Distribution Unit (CDU) is an essential component in liquid cooling systems that distribute coolant or water evenly throughout the system. The CDU regulates and controls the flow of coolant, maintaining the desired temperature and flow rate. It works in conjunction with pumps, radiators, heat exchangers, and control units to ensure the cooling system runs smoothly and efficiently. The CDU also helps keep the system clean by removing impurities from the coolant, preventing clogging and damage to other components in the system. Overall, the CDU plays a critical role in maintaining the proper functioning of liquid cooling systems. 4U Rack-based CDUs are optimized to efficiently and seamlessly integrate into a large, high power device like a data center server chassis. Server rack cooling is easy to use with CDU installation instructions as simple as completing the liquid loop, filling the liquid reservoir tank, and flipping the switch. These systems offer a fast option to upgrade to liquid cooling in a cost effective and reliable package and can be fully self-contained or integrated into available facility cooling systems.

Upstream: The main components of a CDU include pumps, reservoirs, power supplies, control boards, and heat exchangers. Additionally, filters, flow meters, pressure transducers, and other devices are usedin managing the operation of the CDU in conjunction with the Server Rack. Downstream: CDUs are primarily used in data centers.

In 2025, global sales of 4U Rack-based CDUs reached approximately 32 K units, with an average global market price of around US$ 11 K/unit. Production capacity varies significantly among manufacturers, with gross profit margins ranging from approximately 30% to 50%.

Fast Market Growth: In the current landscape dominated by AI-driven applications and dense chip architectures, liquid cooling has emerged as a pivotal technology. CDU, as a key part in liquid cooling system, will benefit from the prevalence of AI and high performance computing (HPC). The CDU market is expected to experience fast growth in the coming years.

Intensified Competition: As showing great market potential, many investors and companies have laid their attentions on the CDU market. With more and more companies will enter in the CDU industry, the whole market competition will be intensified in the coming years.

Continued Technology Innovation: CDU include liquid-to-liquid and liquid-to-air types. Though limited in cooling capability compared with liquid-to-liquid CDUs, liquid-to-air CDUs don’t require water pipes, can be installed more easily, and take less space and lower initial cost than liquid-to-liquid CDUs. While although liquid-to-liquid CDUs hold the best cooling performance of all types. They require, among others, pipes to be installed to operate with a facility’s water. More research and technology innovation will be put on liquid-to-liquid CDUs by CDU manufacturers to provide high performance CDU to data centers.

Key Questions Addressed in this Report

What is the 10-year outlook for the global 4U Rack-based CDUs market?

What factors are driving 4U Rack-based CDUs market growth, globally and by region?

Which technologies are poised for the fastest growth by market and region?

How do 4U Rack-based CDUs market opportunities vary by end market size?

How does 4U Rack-based CDUs break out by Type, by Application?

This report presents a comprehensive overview of the global 4U Rack-based CDUs market, covering market size and forecast, segmentation by product type and application, competitive landscape, leading players and regional and country-level outlook.

Segment by Type

• Liquid to Air CDU
• Liquid to Liquid CDU

Segment by Installation Level

• Rack-based CDU
• Row-based CDU

Segment by Capacity

• Capacity ＜ 100kW
• Capacity ≥ 100kW

Segment by Application

• Internet
• Telecommunications
• Finance
• Government
• Other

Who Can Use This Report?

This report is written for decision-makers who need a clear, data-backed view of the global 4U Rack-based CDUs market:

• Manufacturers, suppliers and solution providers benchmarking their position and planning product, capacity and go-to-market strategy
• Distributors, channel partners and end users in Internet, Telecommunications, Finance evaluating demand and sourcing options
• Investors, financial analysts and consultants assessing growth opportunities, competitive dynamics and M&A potential
• Government agencies, industry associations and research institutions tracking industry developments and policy impact