Coolant Distribution Units (CDU)

Engineered for mission-critical AI data centers, LG CDUs deliver reliable, scalable liquid cooling designed to support continuous operation.

Benefits & Features


Benefits
• High Reliable, Efficiency and Precision Capacity Control
• High-Quality Components: Reliability and Performance
• Qualified for NVIDIA Marketplace listing(1.0MW, 600kW)
• Qualified as NVIDIA DSX Ready CDU(2.6MW)
• Versatile Design and Hot-Swap Structure
• AI Virtual Sensor for Intelligent Cooling Control
• Intuitive HMI

Features
• Capacity lineup covering 0.6MW, 1.0MW and 2.6MW classes
• Primary water and secondary PG25 coolant circuits
• Top / Bottom pipe direction available
• Inverter pump configuration by model
• BPHE heat exchanger applied
• Optional ATS, PICV, Harmonic Filter and ETC.

Specification


600kW
• Cooling Capacity : 600 kW
• Unit Dimensions (H x W x D), mm (in) : 2080 x 590 x 1270 mm(81.9 x 23.2 x 50 in)
• Weight (Net), kg (lbs) : 700 kg (1,543 lbs)
• Weight (Operation), kg (lbs) : 820 kg (1,808 lbs)
• Operational Noise : < 55 dB(A)
• Qualified for NVIDIA Marketplace Listing : View on NVIDIA

1.0MW
• Cooling Capacity : 1000 kW
• Unit Dimensions(H x W x D), mm (in) : 2138 x 1005 x 1204 mm (84.2 x 43.5 x 47.4 in)
• Weight (Net), kg (lbs) : 1,040 kg (2,292 lbs)
• Weight (Operation), kg (lbs) : 1,280 kg (2,822 lbs)
• Operational Noise : < 55 dB(A)
• Qualified for NVIDIA Marketplace Listing : View on NVIDIA

2.6MW
• Cooling Capacity : 2600 kW
• Unit Dimensions(H x W x D), mm (in) : 2200 x 2200 x 1600 mm (86.6 x 86.6 x 63.0 in)
• Weight (Net), kg (lbs) : 2,870 kg (6,327 lbs)
• Weight (Operation), kg (lbs) : 3,937 kg (8,680 lbs)
• Operational Noise : < 60 dB(A)
• Qualified as NVIDIA DSX Ready CDU : View on NVIDIA

Resource Download

Document

Proposal

extension : pdf
2026 LG Data Center Liquid Cooling Solutions(CDU) Proposal

Find Insights Behind the Solutions

Why CRAH Still Matters: The Essential Role of Air Cooling in Modern Data Centers

Integrated Cooling Strategies for Data Centers

The Future of Data Centers: Energy Efficiency and Waste Heat Potential

Data Center Cooling: Air vs. Liquid - Which Way to the Future?

Related Products and Solutions

FAQs

Q.

What is a Coolant Distribution Units (CDU) in a data center?

A.

CDU distributes coolant to IT equipment and transfers heat between the IT liquid loop and the facility-side cooling system while maintaining stable temperature, flow, and pressure.

 

Key functions of a CDU include:

 

• Supplying coolant to liquid-cooled IT equipment such as cold plates

• Transferring heat from the IT loop to the facility-side cooling loop through a heat exchanger

• Connecting the IT cooling loop with upstream cooling infrastructure such as chillers

• Helping maintain controlled and predictable operating conditions for data center operators

 

LG approaches the CDU as part of an end-to-end thermal management strategy supported by its HVAC and cooling expertise. Its portfolio includes chillers, air-side cooling, liquid cooling components, and control and monitoring solutions.

Q.

Why are data centers moving from air cooling to liquid cooling?

A.

As AI servers and GPUs generate higher rack heat densities, data centers are increasingly adopting direct-to-chip liquid cooling to remove heat closer to the source and support more stable thermal management.

 

Key benefits include:

 

• Direct heat removal from high-heat components such as CPUs and GPUs

• Reduced dependence on server and room airflow

• Greater cooling capacity for high-density AI environments

• More stable coolant flow and temperature through the CDU

• Low ATD of 4°C (7.2°F) to support efficient heat exchange

• Defined loop conditions and filtration to help protect the cooling system

• Support for scalable hybrid and liquid cooling architectures as data center requirements evolve

 

LG supports this transition with an integrated portfolio spanning chillers, air-side cooling, liquid cooling components, and control solutions.

Q.

What liquid cooling approaches typically use a CDU?

A.

CDUs are commonly used in liquid cooling architectures that require controlled coolant distribution and heat transfer between the IT and facility cooling loops.

 

Common CDU applications include:

 

• Direct-to-Chip cold plate cooling

• Two-phase Direct-to-Chip architectures in selected system designs

• Immersion cooling configurations where a CDU is integrated with the facility loop

• Hybrid cooling systems combining air and liquid cooling

Q.

How do you size a CDU for an AI data center liquid cooling loop?

A.

CDU sizing starts with the required cooling capacity and then considers flow rate, pressure, piping, temperature, redundancy, and future expansion. In hyperscale AI data centers, CDUs are typically deployed as repeatable cooling blocks that can scale with rack density and total IT load.

 

To size a CDU:

 

• Estimate the required capacity based on IT load and rack density.

• Define the number of racks supported per CDU and future growth.

• Set the target coolant temperature and operating ΔT.

• Confirm flow rate, pressure drop, pipe size, and pump configuration.

• Plan for redundancy and multi-unit expansion.

 

LG’s Direct-to-Chip CDU lineup includes 600 kW, 1,000 kW and 2,600kW configurations.

Q.

Why is redundancy important in liquid cooling equipment?

A.

Redundancy helps maintain cooling operation when an individual component fails or requires maintenance, reducing the risk of overheating and system downtime.

 

Key redundancy features of LG CDUs include:

 

• N+1 pump and inverter redundancy

• Redundant sensors for continued system monitoring

• AI virtual sensors that estimate backup values when a physical sensor experiences an issue

• Hot-standby inverter operation in multi-CDU configurations

• Fast changeover to help maintain stable flow and temperature

• Service-oriented design and operator monitoring for ongoing system management

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