STULZ

Precision cooling maker whose CyberCool CDU covers 345–1,380 kW in two sizes, plus a 2 MW CDU built to the OCP Project Deschutes spec.

CDU HQ Hamburg, Germany Checked 9 Nov 2026

Smallest CDU: 345 kW STULZ CyberCool CDU product page, 9 Nov 2026
Largest CDU: 2,000 kW OCP Marketplace: STULZ Deschutes CDU, 9 Nov 2026

Rating conditions

CyberCool CDU: 345–1,380 kW rated at 32°C facility water / 36°C TCS supply. Deschutes CDU: 2 MW @ 3°C ATD, 500 GPM (OCP listing).

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Datasheet

Source on every value

Technologies Liquid cooling product types the vendor sells today. 'Liquid-to-air CDU' is a sidecar unit or heat dissipation unit that needs no facility water. 'Two-phase cold plate' boils a refrigerant or dielectric on the chip.: CDU 1
Smallest CDU kW Rated cooling capacity of the smallest shipping CDU in the line, as the vendor publishes it. Rating conditions (approach temperature, fluid) are in the spec notes. Blank when not published.: 345 1
Largest CDU kW Rated cooling capacity of the largest shipping CDU, as the vendor publishes it. Prototypes and announced-only units are left out and named in the spec notes. Blank when not published.: 2,000 2
GPU platforms (vendor-stated) GPU or rack platforms the vendor itself names as supported, certified or targeted, such as NVIDIA GB200 NVL72 or Vera Rubin. Vendor statements only, each with a source. Blank when the vendor names none.: Not published
Level Where the products sit: in the server, in the rack, in the row, or at facility scale (skid or facility distribution unit).: In-row 1
Coolant Coolant on the IT side: water-glycol (PG25 and similar), single-phase dielectric (oils, GTL, synthetic hydrocarbons) or two-phase dielectric or refrigerant.: Water-glycol 1
Max per rack kW Highest rack density the vendor publishes for its own system (immersion tank, in-rack CDU, rear door or OEM rack). Filled only when the vendor states a per-rack figure.: Not published
Rear door max kW Highest published heat removal of the vendor's rear-door heat exchanger, per rack.: Not published
Vendor type Liquid cooling specialist, thermal and HVAC major, power and data center infrastructure major, server OEM, component maker (cold plates, connectors, CDUs sold to OEMs) or fluid supplier.: Thermal and HVAC major 1
Parent company Owner or controlling shareholder when the vendor sits inside a larger group, such as CoolIT under Ecolab or Motivair under Schneider Electric.: Not published
HQ region Region of the vendor's (or brand owner's) headquarters.: Europe 1
HQ country Country of the vendor's (or brand owner's) headquarters.: Germany 1
Headquarters Headquarters city and country as the vendor states it.: Hamburg, Germany 1
Manufacturing Regions or sites where the vendor says it builds liquid cooling products. Blank when not published.: Not published
Key products Main product lines and model names for data center liquid cooling.: CyberCool CDU, STULZ Deschutes CDU 1
Spec notes Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.: CyberCool CDU: 345–1,380 kW rated at 32°C facility water / 36°C TCS supply. Deschutes CDU: 2 MW @ 3°C ATD, 500 GPM (OCP listing). 1

Sources

STULZ CyberCool CDU product page accessed 2026-11-09
OCP Marketplace: STULZ Deschutes CDU accessed 2026-11-09

STULZ alternatives

Largest CDU

Nidec 2,000 kW1
nVent 2,000 kW1
ZutaCore 2,000 kW1
Airedale by Modine 2,160 kW2
JetCool (Flex) 1,800 kW1
Boyd Thermal (Eaton) 2,300 kW3

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