CDU

8/12/18 kW In-Rack Liquid-to-Air CDU

Quick Answer8/12/18 kW In-Rack Liquid-to-Air CDU — an IDCPDU CDU for liquid-cooled high-density racks.

3 kW per 1U of rack space — Heat is removed inside the rack instead of blown into the room, so GPU density rises without rebuilding the air conditioning.
PUE down to 1.15 — Liquid-to-air transfer at the rack cuts the air-side energy that normally dominates the bill — the number operators are judged on.
±0.5 °C control accuracy — Tight enough for GPU and laser loads whose performance drifts before a conventional CRAC even reacts.
40 / 50 °C water, free-cooling friendly — The loop runs warm enough for chiller-less operation most of the year, so the cooling plant does not have to work in winter either.
Filtration on the coolant side — The filters protect cold-plate micro-channels; one blocked channel is a hot GPU that no amount of airflow will fix.
A third of the cabinet space back — Compared with a conventional in-row layout, the saved U is revenue-bearing rack space, not just a tidier drawing.

Tel: +86-574-63783045 · ricky@idcpdu.com

Dual-mode liquid-to-air cooling in 4U, 6U or 8U heights.
±0.5 °C control accuracy and PUE as low as 1.15.
Warm-water ⁦40–50⁩ °C operation without a chiller plant.
The dual-mode liquid-to-air architecture dynamically balances air and liquid cooling. Within a compact 4U footprint it reaches a heat dissipation density of up to 12 kW (3 kW per 1U), several times the capacity of traditional air-cooled solutions, and the series scales to 6U 12 kW and 8U 18 kW models.
Temperature regulation with ±0.5 °C accuracy suppresses GPU thermal runaway within seconds and keeps the system stable. Inlet and outlet water temperatures of ⁦40–50⁩ °C integrate directly with warm-water cooling loops, pulling PUE down to 1.15 while saving 33% of cabinet space, covering deployments from edge computing to supercomputing clusters.

Frequently Asked Questions

What is the difference between liquid-to-liquid and liquid-to-air CDUs?

Liquid-to-liquid CDUs transfer heat to the facility's chilled water circulation system, offering the highest efficiency and making them ideal for high-density environments. In contrast, liquid-to-air CDUs release heat directly into the indoor air, making them suitable for facilities without a dedicated chilled water system.

How does a CDU improve data center PUE and efficiency?

A CDU improves data center efficiency by providing targeted liquid cooling, which lowers the Power Usage Effectiveness (PUE). By enabling the use of warmer facility water, CDUs reduce the need for energy-intensive chillers and increase the opportunities for free cooling, saving both energy and operational costs.

What is the role of a CDU in liquid cooling?

The Coolant Distribution Unit (CDU) acts as the critical interface between the facility's chilled water and the IT equipment. It separates the loops, regulates the coolant temperature above the dew point to prevent condensation, and ensures precise flow control, making liquid cooling safe and efficient.

Models	4U 8 kW / 6U 12 kW / 8U 18 kW in-rack CDU
Cooling capacity	8 kW / 12 kW / 18 kW by model
Cooling type	In-rack liquid-to-air CDU
Heat dissipation density	Up to 12 kW per unit, 3 kW per 1U
Temperature control accuracy	±0.5 °C
PUE	As low as 1.15
Inlet / outlet water temperature	40 / 50 °C
Primary side flow	1.2 / 1.5 / 2.1 m³/h (8 / 12 / 18 kW)
Secondary side liquid	Deionized water, ethylene glycol or propylene glycol
Size (W×D×H)	482×900×178 mm (4U) / 482×900×267 mm (6U) / 482×900×365 mm (8U)
Filtration accuracy	⁦50–100⁩ µm
Application	Data centers, IDC rooms, industrial lasers, energy storage systems
Space saving	33% cabinet space saved vs. conventional layouts

Deployment	Rack-mounted 4U / 6U / 8U beside the servers; releases heat to the room air, no chilled-water plant required
Response	Engineering drawings in 30 minutes, quotation in 1 hour

8/12/18 kW In-Rack Liquid-to-Air CDU

Product Description

Product Specifications

Additional Specifications

Product documents

Support & Contact

Feedback

Frequently Asked Questions

Related Products

In-Row Liquid-to-Liquid CDU 500–2000 kW

Cabinet-Type In-Row CDU 500–2000 kW

600 kW GPU Cabinet CDU for GB200 / GB300