Methodology

Vendor datasheets, read with their rating conditions, a link on every number and a date on every row.

Every figure is the vendor’s own

Every kW figure is the vendor’s own rating, taken from its datasheet, product page, OCP Marketplace listing or press release. Only published ratings go in the table, so a blank cell means the vendor publishes no figure. The small number beside each value opens its source, and the source list on each vendor page shows the date we read it.

GPU platforms are what the vendor itself names as supported, certified or targeted, with the source. NVIDIA publishes no CDU supplier list, so a stated platform is the vendor’s claim; ask for the test report at your own rating point.

Ratings come with conditions

A CDU’s capacity holds at a stated approach temperature difference (ATD) and fluid. The same Rittal in-row unit is rated 1,000 kW at 4 K and 1,500 kW at 6 K; Silent-Aire quotes 1,050 kW with 25% propylene glycol and DCD reports 1.4 MW on water. We store the headline rating in the column and the conditions in each vendor’s spec notes. Compare at the same ATD.

What the ranges include

Smallest and largest CDU cover shipping units only. Prototypes and announced-only products are named in spec notes and left out: Nidec’s 3.2 MW NIR 3.0 (mass production targeted H1 2027) and its 300 kW in-rack CDU, and Delta’s 2.4 MW and 3 MW in-row CDUs. Cooler Master’s 2.5 MW CDU is in, because its spec sheet is public.

Where published figures conflict, the cell stays blank and the spec notes say why. EAS states CDU systems from 5 MW to 20 MW+ without a single-unit rating, and Kehua’s 250 kW CDU figure sat on a page that now returns 404. The columns hold ratings you can compare like for like; energy-savings and PUE claims stay in the vendor’s own material, because each vendor measures them its own way.

Ownership

Parent companies come from filings and deal releases: Ecolab’s 10-Q for CoolIT, Eaton’s closing release for Boyd Thermal, Schneider Electric’s for Motivair, Vertiv’s for CoolTera. LiquidStack’s parent is Trane Technologies after the deal closed in March 2026. A deal shows only once it has closed.

Corrections

Send a public source to hello@liquidcoolingvendors.com and the row is re-checked and re-dated. Featured placement is paid and labelled; every row keeps its own data and sort position.

The approach is the gap between the two readings: 4 K at STULZ’s CyberCool rating point of 32 °C facility water and 36 °C supply (STULZ, checked 9 Nov 2026).

Coverage

Technology	Vendors
CDU	26
Cold plate	16
Immersion, single-phase	11
Manifolds	10
Fluids	8
Connectors	7
Server OEM	7
Liquid-to-air CDU	6
Rear door	4
Two-phase cold plate	2
Immersion, two-phase	1

46 vendors, all checked 9 Nov 2026. Largest CDU on file: 8,150 kW (DCX).

Field definitions

20 fields

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.
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.
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.
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.
Blackwell stated: The vendor names an NVIDIA Blackwell platform (B200, GB200 or GB300) as supported, certified or targeted.
Vera Rubin stated: The vendor names NVIDIA Vera Rubin (or Vera Rubin NVL144) as supported or targeted.
AMD stated: The vendor names an AMD platform (such as Helios) or AMD GPUs as supported.
Level: Where the products sit: in the server, in the rack, in the row, or at facility scale (skid or facility distribution unit).
Facility-scale units: Sells facility-scale units: a skid CDU, a facility distribution unit or plant-level distribution.
Coolant: Coolant on the IT side: water-glycol (PG25 and similar), single-phase dielectric (oils, GTL, synthetic hydrocarbons) or two-phase dielectric or refrigerant.
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.
Rear door max kW: Highest published heat removal of the vendor's rear-door heat exchanger, per rack.
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.
Parent company: Owner or controlling shareholder when the vendor sits inside a larger group, such as CoolIT under Ecolab or Motivair under Schneider Electric.
HQ region: Region of the vendor's (or brand owner's) headquarters.
HQ country: Country of the vendor's (or brand owner's) headquarters.
Headquarters: Headquarters city and country as the vendor states it.
Manufacturing: Regions or sites where the vendor says it builds liquid cooling products. Blank when not published.
Key products: Main product lines and model names for data center liquid cooling.
Spec notes: Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.