# Accelsius

> Accelsius designs and manufactures NeuCool two-phase, direct-to-chip cooling systems for AI and high-performance computing data centers. Founded by Innventure in 2022 using technology from Nokia Bell Labs, it combines refrigerant cooling hardware with deployment, monitoring and maintenance services.

- **Founded:** 2022
- **Headquarters:** Austin, United States
- **Founders:** Innventure (Company founder and venture builder), Josh Claman (Founding CEO; Executive Chairman since May 2026)
- **Products:** NeuCool platform, NeuCool MR250, NeuCool IR150, Thermal Simulation Rack, NeuGuard and professional services
- **Notable:** Commercial NeuCool launch in 2024., $24 million Series A announced in November 2024., MR250 general availability announced October 13, 2025.

## Products & services

- **NeuCool platform** — Pumped two-phase direct-to-chip cooling using dielectric refrigerant, chip-mounted Vaporators, manifolds, a condenser and monitoring.
- **NeuCool MR250** — Row-based CDU with 250kW rated liquid cooling capacity and redundant, serviceable components; rack configurations depend on product specification.
- **NeuCool IR150** — Integrated rack with up to 150kW cooling capacity, 42U of IT space and built-in liquid and vapor manifolds in an 800mm-wide enclosure.
- **Thermal Simulation Rack** — Thermal load test platform for validation and commissioning without using expensive AI servers; original introduction described 50kW per rack.
- **NeuGuard and professional services** — Site assessment, modeling, integration, deployment, limited warranty options, remote and onsite service, maintenance and tailored SLAs.
- **NeuCool HyperStart** — Engineering support, deployment planning and technical validation for hyperscale operators, neoclouds and partners.

## Achievements

- Commercial NeuCool launch in 2024.
- $24 million Series A announced in November 2024.
- MR250 general availability announced October 13, 2025.
- DarkNX signed an agreement for a planned 300MW Ontario campus in November 2025.
- $65 million Series B announced January 12, 2026.
- IR150 general availability announced April 20, 2026.
- July 2026 company-reported third-party B200 benchmark compared approximately 40,000 operating points.

## Latest updates

- **2026-08** — Announced IR150 deployment at EdgeConneX’s Houston Global Training Center.
- **2026-07** — Published third-party B200 benchmarking showing 9°C lower junction temperatures under tested warm-water conditions.
- **2026-05** — John Hewitt named CEO; Josh Claman became Executive Chairman.
- **2026-04** — Announced IR150 general availability and the HyperStart validation program.
- **2026-01** — Announced $65 million Series B led by Johnson Controls with Legrand participation.

## Links

- Website: https://accelsius.com/
- LinkedIn: https://www.linkedin.com/company/accelsius/
- Twitter/X: https://x.com/AccelsiusATX

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Profile page: https://yespress.io/accelsius
Published by YesPress — https://yespress.io
Last updated: 2026-10-03