Two-phase direct-to-chip liquid cooling firm Accelsius has secured a new data center customer win in Canada.

The company this week announced that DarkNX, a new digital infrastructure company, has entered into an agreement to deploy Accelsius’ NeuCool technology across a planned 300MW AI data center campus in Ontario, Canada.

The first phase is set to include two facilities at 65MW, with deployments scheduled for 2026 and 2027. Further details weren't shared.

DarkNX selected NeuCool for chip-level cooling alongside chiller systems from Johnson Controls for facility cooling. Accelsius said the project is expected to be the largest two-phase, direct-to-chip deployment to date.

“This milestone represents a defining moment for the evolution of liquid cooling,” said Josh Claman, CEO of Accelsius. “DarkNX’s 300MW commitment signals a clear shift toward large-scale adoption of two-phase, direct-to-chip cooling. We’re excited to support Isaac and the DarkNX team in demonstrating how next-generation cooling, applied at scale, sets a new standard for AI-era data centers.”

Texas-based Accelsius was originally founded in 2022 by Nasdaq-listed industrial firm Innventure to commercialize technology developed by Nokia's Bell Labs that had not been productized. Johnson Controls recently invested in the firm.

Accelsius has deployed its technology at several data center labs, and recently posted on LinkedIn that its NeuCool Thermal Simulation Rack is headed to London for deployment at Telehouse's new Liquid Cooling Lab. It has also deployed a cooling system to an Equinix lab in Virginia and at Park Place Technologies' new facility in Cleveland, Ohio.

DarkNX launches

Founded this year, DarkNX describes itself as a developer of high-density modular data centers optimized for AI and GPU workloads.

Few details about the company or its planned projects are available. The company claims to have a proprietary immersion cooling technology known as AquaFlow.

“Our vision is to build the world’s most advanced AI data centers and to do that, we must build them responsibly and efficiently,” said Isaac Islam, CEO of DarkNX. “Our technology-agnostic and efficiency-first approach is why Accelsius’ two-phase, direct-to-chip technology stood out for enabling significantly warmer facility water temperatures, which paired with high-efficiency chiller systems from Johnson Controls, gives us a step-change in performance, sustainability, and total cost of ownership. This is the future of AI data center design, and we’re proud to lead the way.”

Islam is also part of the recently-founded TG Venture Partners, and listed as founder of Skyridian, a company aiming to develop a network of orbital data centers. He was previously at industrial data platform firm Litmus.