Accelsius has made its NeuCool IR150 generally available, bringing a fully integrated, rack-level two-phase direct-to-chip cooling system to market. Unveiled at Data Center World 2026, the NeuCool IR150 combines a two-phase CDU (coolant distribution unit), a 42U IT rack, and built-in liquid and vapor manifolds inside a single 800 mm-wide enclosure, with up to 150 kW of cooling capacity.
Accelsius is also launching the NeuCool HyperStart program, a structured effort aimed at hyperscale operators, neocloud providers, and partners to validate two-phase direct-to-chip cooling for next-generation AI infrastructure. The company describes HyperStart as including early engineering support, deployment planning, and technical validation, and says participants can evaluate two-phase systems alongside single-phase water direct-to-chip approaches as they work these technologies into reference designs and roadmaps.
The IR150’s “integrated rack” approach is a practical packaging decision as much as a thermal one: putting the CDU, manifolding, and rack into one enclosure can simplify deployment and standardize interfaces for operators that want to scale without building a one-off mechanical plant around every new high-density cluster. But a rack-integrated design also forces engineering teams to think carefully about service access, spare strategy, and how the rack-level cooling unit fits into facility distribution, commissioning, and failure-mode planning.
Josh Claman, CEO of Accelsius, tied the product and program to near-term AI buildout pressure: “Hyperscalers and neoclouds are under enormous pressure to deliver AI capacity faster than ever… moving fast and planning responsibly are not mutually exclusive.”
Two-phase details and product lineup
Accelsius’ two-phase approach uses a non-conductive dielectric refrigerant with an A1 safety rating and low global warming potential. The company says no water enters the IT rack, and it contrasts that with single-phase liquid cooling systems that circulate treated water to the chip.
The NeuCool IR150 joins two other products in the NeuCool line: the NeuCool MR250, a row-based CDU delivering up to 250 kW+ of cooling capacity per rack, and the NeuCool Thermal Simulation Rack (TSR), described as a thermal test platform.
Source: Accelsius
