OptiCool Technologies has announced the release of its 120 kW Rear Door Heat Exchanger (RDHx), which it claims is the highest-capacity rear door heat exchanger currently available for data center environments. This new two-phase liquid cooling solution is designed to support rack densities up to 120 kW and targets the cooling demands of artificial intelligence (AI) and high-performance computing (HPC) workloads.
The 120 kW Rear Door Heat Exchanger features OptiCool’s proprietary two-phase refrigerant technology. According to the company, this design removes heat from each rack and returns cooled air to the room at ambient temperature. The unit is engineered for easy retrofit into existing data center spaces, supporting higher rack densities without requiring separate containment zones or major modifications to infrastructure.
OptiCool states that its two-phase approach delivers significant energy efficiency compared to traditional air-based cooling systems. The new 120 kW RDHx extends the company’s existing portfolio, which previously included 30 kW and 60 kW models. In tested deployments with lower-capacity OptiCool units, operators have achieved power usage effectiveness as low as 1.02, supporting energy and efficiency goals for data center operators.
The company lists modular scalability, retrofit compatibility, and a reported ability to cut cooling energy use by up to 90 percent among key product features. Market segments identified in the announcement include colocation and hyperscale data centers focused on dense compute racks, especially those for next-generation GPUs.
“The 120kW Rear Door Heat Exchanger sets a new standard for cooling today’s high-density AI and HPC workloads,” said Matthew Roberts, VP of Sales at OptiCool Technologies. “No other rear door cooler comes close to this capacity. Our first-to-market, two-phase refrigerant design gives operators a direct path to cooling 80kW+ racks without the cost, risk, or vendor lock-in of other liquid cooling technologies.”
OptiCool will demonstrate its cooling solutions at the YOTTA 2025 event, scheduled for September 8 through 10.
Source: OptiCool Technologies
