Johnson Controls (Silent-Aire)

Johnson Controls' Silent-Aire in-row CDUs run about 500–1,050 kW per unit and scale past 10 MW when combined. They are built in North America, Europe and Asia Pacific.

CDU HQ Cork, Ireland Owned by Johnson Controls Checked 9 Nov 2026

Smallest CDU: 500 kW Silent-Aire CDU, 9 Nov 2026
Largest CDU: 1,050 kW Silent-Aire CDU, 9 Nov 2026

Rating conditions

1,050 kW with 25% propylene glycol at 5.2°C approach. DCD reports 1.4 MW on water at 3.5°C approach. Systems scale to 10 MW+.

Visit Johnson Controls Compare with alternatives Request a quote

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.: 500 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.: 1,050 1
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, Facility 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.: Johnson Controls 1
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.: Ireland 1
Headquarters Headquarters city and country as the vendor states it.: Cork, Ireland 1
Manufacturing Regions or sites where the vendor says it builds liquid cooling products. Blank when not published.: North America; Europe; Asia-Pacific 1
Key products Main product lines and model names for data center liquid cooling.: Silent-Aire CDU 1
Spec notes Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.: 1,050 kW with 25% propylene glycol at 5.2°C approach. DCD reports 1.4 MW on water at 3.5°C approach. Systems scale to 10 MW+. 1

Sources

Silent-Aire CDU accessed 2026-11-09
Johnson Controls CDU launch (Sept 2025) accessed 2026-11-09
DCD: Johnson Controls launches 1 MW CDU accessed 2026-11-09

Johnson Controls alternatives

Largest CDU

LiquidStack 1,350 kW1
Chilldyne 1,500 kW1
Delta Electronics 1,500 kW1
Rittal 1,500 kW2
HPE (Hewlett Packard Enterprise) 1,600 kW3
JetCool (Flex) 1,800 kW1

See all CDU vendors.

Get quotes from Johnson Controls and similar vendors

Tell us what you need once. We send it to matching liquid cooling vendors and they reply to you directly.