In-Row Liquid-to-Air Coolant Distribution Units
Density is climbing faster than most rooms were built to handle. The good news is you don't need to convert the whole data hall to go liquid. Gradian L2A CDUs cool row by row, rejecting heat straight into the air, and scale capacity up to 240 kW as density demands.
Up to 240 kW Cooling Capacity
No Facility Water Loop Required
1+1 Pump / N+1 Fan Redundancy
Modular, Group-Controlled Scaling
Key Features
Redundancy Built In
1+1 redundancy across fans, pumps, and power keeps cooling running through component faults or routine service, with no interruption to the row.
Scalable Capacity. Modular Design
Cooling capacity up to 240 kW and supports group control, so you can run multiple machines together as one system, and units can be modularized to add cooling capacity as the row grows.
Real-Time Monitoring and Fault Detection
PLC control with a 7" HMI touchscreen and integrated temperature, flow, pressure, and leakage monitoring, backed by a three-level alarm that pinpoints faults fast for quick response.
Technical specifications
| Rated Cooling Capacity | 90 kW |
|---|---|
| Primary Airflow (nominal) | 6,120 m³/h |
| Secondary Flow | 4.3 m³/h (72.1 LPM) |
| Approach Temperature | 20°C |
| Pump Configuration | Dual pump, freq. conversion |
| Fan Redundancy | — |
| Height | 2100mm |
|---|---|
| Width | 600mm |
| Depth | 1200mm |
| Power Supply | 380-480V AC 3P+N |
|---|---|
| Communication | 2× RS485, 2× RJ45 |
| Protocol | Modbus RTU / TCP-IP |
| Noise Level | 85 dB(A) |
Specifications shown reflect our standard configuration. Capacity, materials, and features can be adjusted to your specific application.
Your Bridge To Liquid Cooling
A facility-wide water loop is a major investment. Not one you should have to make just to cool one high-density row. Reject heat straight to the air within a single server row. Unlock high-density racks without the cost and complexity of a full water loop install.
Air-Side Heat Rejection - Reject heat directly to the surrounding air, no cooling tower or facility water loop required.
Row-by-Row Scalability - Add liquid cooling capacity where density actually is, without sizing for the whole facility upfront.
Lower Upfront Infrastructure Cost - Avoid the plumbing, piping, and civil work a facility-wide liquid loop would require.
Capacity That Grows With the Row
AI infrastructural demands don’t move in predictable steps. Your cooling shouldn't have to guess where it's headed next. Keep cooling capacity aligned with the rapidly changing demands of High Performance Compute.
Scalable Capacity - Select from 90 kW, 120 kW, and 240 kW models based on row-level cooling requirements.
Modular Deployment - Add In-Row L2A CDU capacity as additional high-density equipment comes online.
Group Control - Coordinate multiple units as part of a larger row-level cooling system.
Keep Critical Cooling Online
A row going down because of a single-component fault is the kind of outage that shouldn't happen. 1+1 redundant pumps, N+1 redundant fans, and dual power input keep cooling online through component faults or routine service—you never need to stop the row
1+1 Pump Redundancy - Continue operation on the standby pump while the primary is serviced.
N+1 Fan Redundancy - Maintain airflow through a fan failure without interrupting cooling to the row.
Online Maintenance - Service pumps and filters without powering down the unit or the row it's cooling.
Questions, answered
An in-row L2L CDU is a coolant distribution unit that transfers heat between a facility water loop (primary side) and a technology cooling loop (secondary side), supporting direct-to-chip liquid cooling and rear-door heat exchangers (RDHx) in high-density data centers.