From Air Cooling to Liquid Cooling: The Fundamental Restructure of Modern AI Data Centers

6-8kW to 40-114kW: The Density Math That Turned Liquid Cooling From Optional to Compulsory

AI training clusters have shattered the traditional 6-8kW cabinet balance, with NVIDIA DGX H100 and HGX B200 servers pushing single-rack density to 40-114kW, far beyond air cooling's 15-20kW physical limit. As a core retrofit device, the rear door heat exchanger with CDU delivers stable heat dissipation for 20-35kW medium-density AI inference racks, and replacing the original cabinet rear door requires no server modification or civil construction, cutting renovation costs by over 40%. Combined with chip-level cold plates, hybrid deployment raises single-rack ceilings to 50kW+, while lowering comprehensive PUE to 1.15-1.20, making liquid cooling a rigid compliance requirement for new data centers. EXTRCOOL provides one-stop liquid cooling solutions.

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Area 51, NV, USA

EXTRCOOL INDUSTRY LIMITED

Associated Trend items

Cooling the AI Boom, Liquid Cooling Routes and the Vendors Racing In

Six Components, Two Routes and Eight Vendors Scaling: Who Holds Certification, Yield and Capacity for the Next Round

The AI liquid cooling system rests on six components: CDU, cold plate, rack, fan wall, manifold and quick connector, with liquid-to-liquid on GB200 NVL72 and NVL36 enabling retrofit deployment. Tier 1 vendors are scaling fast: Kaori's May revenue rose 42.2% year on year, Auras guides liquid cooling from 12% of revenue in 2024 to 40-45%, AVC builds three Vietnam plants fo...

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The Heart of Liquid Cooling, Inside the CDU and Where the Market Is Going

From $3.6B to $33.4B With 2.6MW CDUs: The Four Modules, Three Routes and Six Trends Defining Liquid Cooling's Heart

The CDU is the control hub between primary cold source and secondary IT equipment, running plate heat exchange with hydraulic isolation and leak detection with N+1 redundancy. Dongwu Securities puts the global CDU market at about $3.6 billion in 2026 and $33.4 billion by 2030, with the domestic market past RMB 9.2 billion in 2025; Envicool leads cold-plate delivery at 30...

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The Manifold, the Blood Vessel Trunk That Feeds Every Server

Supply and Return as One Loop: The Four Jobs—Distribution, Collection, Isolation, Venting—That Feed Every Server

The manifold sits at the rack rear between the CDU and the server cold plates. The CDU handles total flow; the manifold splits coolant evenly to every cold plate layer, gathers it after heat absorption and returns it to the CDU, closing the loop. Its jobs: even distribution preventing bias flow and GPU hot spots, collection back to the CDU for re-cooling, per-branch ball...

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