Accelsius has announced the close of a $65 million Series B funding round led by Johnson Controls, with Legrand joining as a strategic investor. Accelsius says it will use the capital to accelerate deployment of its proprietary two-phase, direct-to-chip liquid cooling and expand manufacturing capacity to address rising rack power and thermal density in AI and high-performance computing environments.

The company positions its NeuCool technology as a two-phase liquid cooling approach that uses non-conductive fluids in closed, high-efficiency loops. Accelsius claims its two-phase system enables 35% operating expense savings versus single-phase direct-to-chip cooling and delivers 8% to 17% total cost of ownership savings.

Accelsius links the need for liquid cooling to increasing rack power, stating that IT racks already consume up to 130 kW. It also states that traditional air cooling can consume up to 40% of a data center’s power use, and it is targeting operators moving to liquid cooling to handle the heat generation of modern graphics processing units (GPUs). The company says it is developing new thermal reference designs intended to provide significantly greater cooling capacity, enabling high-performance GPU deployments at higher density.

“AI-scale computing is rewriting the thermal playbook,” said Austin Domenici, Vice President and General Manager, Global Data Center Solutions at Johnson Controls. “Our investment in Accelsius aligns with Johnson Controls’ strategy and commitment to deliver advanced, high-efficiency cooling solutions that enable operators to deliver AI solutions rapidly, now and in the future,”

Accelsius says the Series B funding will support expansion of its Austin production facility, global expansion, and rollout of its two-phase liquid cooling solutions. It also reports recent customer momentum, including an agreement to deploy NeuCool technology across a 300 MW campus for DarkNX in Ontario. Accelsius notes it is a member of NVIDIA’s Inception program.

Source: Accelsius