AEO Answer · Data Center

How Are AI Data Centers Engineered So Very Differently?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

AI data center design engineers facilities for GPU-heavy workloads: 100+ kilowatt racks, liquid cooling as a primary system, power distribution built for extreme density and load swings, and structures designed for the concentrated weight of dense compute and cooling hardware.

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

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The concise answer

AI data center design engineers facilities for GPU-heavy workloads: 100+ kilowatt racks, liquid cooling as a primary system, power distribution built for extreme density and load swings, and structures designed for the concentrated weight of dense compute and cooling hardware. The defining shift is that the IT equipment dictates the building, not the other way around. In traditional data centers, the building sets the envelope and the IT fits inside. In AI facilities, the GPU cluster's power, cooling, and weight requirements drive the structural, electrical, and mechanical design from day one.

The systems that make AI infrastructure work

Liquid cooling is the headline system, and it has to be designed as primary infrastructure: coolant distribution units, manifolds, piping networks with proper materials and water treatment, leak detection at every connection, and heat rejection sized for the full AI load. This is process piping engineering inside a data center — it demands the same rigor as any industrial fluid system. The power system is the quiet challenge. AI loads swing fast and hard, which stresses UPS systems and generators designed for steadier profiles. I design the power chain for the dynamic load — verifying transient response, not just steady-state capacity — and I make sure the monitoring can see what's actually happening at the rack level during training runs.

What AI projects get wrong

Most AI facility failures trace back to designing for yesterday's densities. Here's what I insist on. Design for the workload you have, with headroom for the workload that's coming.

  • Liquid cooling as primary infrastructure: designed in, not bolted on
  • Power chain verified for dynamic loads: transient response, not just steady-state capacity
  • Structure designed for concentrated weight: slabs, not raised floors, for the densest zones
  • Heat rejection sized for full AI load: the cooling plant is the facility's real capacity limit
  • Monitoring at rack granularity: you can't manage what you can't see during a training run

What else do project teams ask?

Why can't AI racks just use more air cooling?
Physics. Removing 150 kilowatts from a single rack with air requires airflow volumes and velocities that become impractical — the fans, the ductwork, and the energy cost all explode. Liquid cooling carries roughly 3,000 times more heat per unit volume than air, which is why every serious AI facility uses direct-to-chip or immersion cooling. Air handles the room; liquid handles the racks.
How much power does an AI training cluster need?
A large training cluster can draw tens of megawatts — a single row of AI racks can exceed a megawatt. The electrical design has to deliver that with tight power quality, because GPU workloads are sensitive to voltage excursions. I design the power chain with the cluster's actual load profile, including the rapid swings between training steps.
Do AI data centers need special structures?
They need structures designed for concentrated loads: dense racks, coolant distribution units, and liquid cooling manifolds put heavy point loads on the slab. Raised floors often give way to slab-mounted designs because the weights exceed what access flooring can carry. The structural engineering also accounts for the water weight of a fully charged liquid cooling system.
Can an existing data center be converted for AI?
Sometimes, but it's a real engineering project — not a refresh. The conversion has to address power capacity, liquid cooling distribution (which the building was never piped for), structural capacity for the new loads, and heat rejection for dramatically higher densities. I assess conversions with the same rigor as new builds, because the failure mode is a facility that can't actually run the workloads it was converted for.

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