OptiCool Technologies, a leader in two-phase liquid cooling solutions, has unveiled its new 120kW Rear Door Heat Exchanger (RDHx), setting a new benchmark in high-density rack cooling. Built to handle the intense heat of today’s AI and HPC systems, this latest innovation can remove up to 120kW of heat per rack the highest capacity available on the market today.

With seamless retrofit capabilities, the 120kW RDHx integrates effortlessly into existing data center environments, eliminating the need for separate cooling zones or major infrastructure upgrades. Leveraging OptiCool’s proprietary two-phase refrigerant technology, the system efficiently transfers heat from the rack and disperses it back into the room at a neutral ambient temperature. By expanding the company’s RDHx lineup, which already includes 30kW and 60kW models, OptiCool offers data center operators a modular, high-capacity option that balances performance, reliability, and energy efficiency.

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“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’s solution delivers substantial energy savings compared to traditional air-based cooling methods. By using the same ultra-efficient design principles as its lower-capacity units which have demonstrated power usage effectiveness (PUE) as low as 1.02 the 120kW RDHx helps data centers reduce energy costs while supporting ESG goals. This makes it ideal for operators preparing for next-generation workloads without compromising sustainability.

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Key benefits of the 120kW Rear Door Heat Exchanger include:

  • Unmatched capacity: Removes up to 120kW per rack.
  • AI/HPC ready: Supports the most demanding GPU clusters without custom buildouts.
  • Retrofit-friendly: Integrates into existing environments with minimal disruption.
  • Ultra-efficient: Cuts cooling energy consumption by up to 90%.
  • Modular scalability that grows with your needs from standard colocation all the way to extreme AI workloads.

OptiCool will showcase its advanced cooling portfolio at YOTTA 2025 (Sept 8-10), demonstrating how its solutions address the increasing demands of high-density digital infrastructure.

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