As liquid cooling becomes the foundation of next-generation AI and high-density data centers, safety and long-term reliability are just as important as cooling performance. While efficiency often takes center stage, the integrity of the liquid circuit remains one of the most critical factors for mission-critical deployments.
We are proud to announce that the NovaCool CDU-ICDU1500 has successfully achieved UL 62368-1, CE, and FCC certifications, demonstrating compliance with internationally recognized safety and electromagnetic compatibility (EMC) standards.
Among these certifications, UL 62368-1 represents a particularly significant milestone. More than simply meeting regulatory requirements, it validates the CDU’s ability to maintain leak-free operation and structural integrity under demanding operating conditions. In this article, we take a closer look at the rigorous qualification process behind the certification and what it means for customers deploying liquid cooling infrastructure.
Why UL 62368-1 Matters for Liquid Cooling Systems
UL is one of the world’s most respected independent safety certification organizations, recognized globally for its rigorous testing standards and comprehensive evaluation processes. Achieving UL certification demonstrates that a product has undergone extensive assessment for electrical, mechanical, and operational safety, providing customers with an added level of confidence beyond manufacturer testing. For liquid cooling equipment such as the NovaCool CDU-ICDU1500, UL 62368-1 Clause G.15 places particular emphasis on protecting against hazards associated with liquid circulation systems. Beyond traditional electrical safety, this clause evaluates the long-term reliability of components exposed to coolant, helping minimize the risks of leakage, material degradation, and system failure throughout the product lifecycle. One of the most demanding aspects of UL 62368-1 certification focuses on verifying the durability of the entire fluid circuit under prolonged thermal and mechanical stress.Long-Term Material Compatibility
Every non-metallic sealing material and connection component used throughout the CDU’s liquid loop underwent extensive chemical compatibility testing. These materials remained immersed in 38°C coolant continuously for 40 days, validating that prolonged exposure would not cause swelling, degradation, or loss of sealing performance. This testing confirms that the integrity of the liquid circuit can be maintained throughout long-term operation, significantly reducing the risk of coolant leakage over the product’s service life.Accelerated Thermal Aging and Pressure Verification
To further evaluate long-term reliability, the complete fluid system underwent accelerated aging at 87°C (188.6°F) for 14 consecutive days, simulating prolonged operation under elevated temperatures. Following thermal aging, the CDU successfully passed a hydrostatic pressure test at three times the maximum working pressure, validating the structural integrity and leak resistance of the entire coolant circuit even after extended thermal stress. Successfully completing these demanding qualification procedures demonstrates the CDU’s ability to maintain reliable, leak-free performance under challenging real-world operating conditions, where continuous uptime is essential.Thermal Cycling and Seal Integrity Verification
Thermal cycling testing was also performed on the complete coolant circuit assembly, repeatedly exposing the system to alternating high- and low-temperature conditions to simulate temperature fluctuations encountered during real-world operation. Following the cycling sequence, the CDU was inspected and pressure-tested to verify coolant circuit integrity, sealing performance, and resistance to thermal fatigue, ensuring reliable leak-free operation throughout long-term service."Achieving UL 62368-1 certification is far more than passing a series of laboratory tests. It reflects the quality philosophy behind every stage of product development—from material selection and sealing design to manufacturing control and long-term reliability validation."
"For our customers, this certification provides independent verification that the NovaCool CDU-ICDU1500 has been engineered to operate safely and reliably in demanding liquid cooling environments. As AI infrastructure continues to scale, that level of confidence becomes increasingly valuable."
Certified for Global Data Center Deployment
In addition to UL 62368-1, the NovaCool CDU-ICDU1500 has also achieved:- CE confirming compliance with European Union safety, EMC, RoHS requirements.
- FCC ensuring electromagnetic compatibility for deployment across the United States.
