The Problem: AI Outpacing Legacy Cooling
The data center industry is at an inflection point. AI and HPC workloads are pushing racks to 50, 80, even 120 kW, which are levels legacy cooling systems were never designed to handle. Air cooling tops out around 20 kW per rack, and even traditional chilled water retrofits strain under the new thermal loads.
Operators face a dilemma:
- Do you retrofit existing facilities with piecemeal upgrades?
- Or do you rebuild from scratch, with multi-year lead times and skyrocketing CAPEX?
Which approach is better and how do you scale fast enough to keep up with AI demand?
The Shift: From One-Size-Fits-All to Right-Sized Cooling
Conventional data centers often depended on large, centralized cooling systems that applied a uniform approach across the entire facility. With AI densities rising, that model is giving way to modular, right sized solutions that can be tailored to the specific requirements of each deployment.
Modern AI infrastructure requires a flexible approach to cooling, just as compute is right-sized for workload, cooling must be right-sized for density, footprint, and growth trajectory.
That’s where Nautilus’s expanded EcoCore product line comes in.
Introducing the EcoCore Product Line
The EcoCore family spans three capacity bands, giving operators the ability to match cooling infrastructure to workload needs:
- EcoCore RCD: Compact, in-row CDU (up to ~2.5 MW) for localized cooling like pods, or end-of-row deployments.
- EcoCore FCD: Facility-scale CDU (2-4 MW per unit) purpose-built for entire data halls.
- EcoCore XCD: Ultra-capacity CDU (up to 10 MW per module) for hyperscalers and mega-campuses, available in a ready-to-deploy containerized package.
Together, they provide a flexible spectrum, from row to campus-scale, all built on the same core DNA of safety, efficiency, and speed.
Why It Matters
- Safety Unlocks Adoption
Leak risk has been the biggest psychological barrier to liquid cooling. EcoCore’s patented variable pressure Leak Prevention System with integrated degassing changes that equation. Instead of fearing liquid, operators can embrace it with confidence.
- Flexibility Enables Growth
EcoCore units support freshwater, saltwater, and closed-loop facility heat rejection sources while remaining agnostic to the IT rack cooling modality. That flexibility means infrastructure doesn’t have to be ripped and replaced as cooling methods evolve.
- Speed Keeps AI on Track
Prefabrication and regional integrators allow deployment in weeks, not years. A 500 kW hall can become a 4MW hall in under four months. That’s the kind of agility AI demands.
Case in point: at Start Campus in Portugal, 12 EcoCore FCDs delivered 12MW of cooling capacity in just 12 weeks, supporting racks at 50 kW+. That’s retrofit agility and performance at scale.
- Sustainability Scales with Density
EcoCore is refrigerant-free and capable of net-zero water draw. Operators can meet regulatory and ESG requirements while simultaneously cutting OPEX by up to 30%.
Lessons from the Field
Unlike vendors still in prototype mode, Nautilus has operated a fully liquid cooled AI facility in Stockton, California, with more than 400,000 unit hours supporting live customer workloads. The insights gained from real world operation are engineered into every EcoCore unit.
The Bigger Picture: Cooling as Strategic Infrastructure
As AI accelerates, cooling is no longer just an engineering concern. It’s a strategic enabler of growth. The right cooling approach determines whether operators can:
- Scale density without throttling performance.
- Control OPEX in an energy-constrained world.
- Satisfy regulators tightening water and refrigerant restrictions.
- Compete in a market where speed to deploy defines competitive advantage.
Right-sizing cooling with a portfolio approach isn’t just efficient, it’s existential.
The expanded EcoCore CDU family: RCD, FCD, and XCD represents more than new products. It represents a philosophy: cooling should scale with you, not hold you back.
The future of data centers will be defined by how fast and how sustainably they adapt to AI’s demands. With EcoCore, operators can stop worrying about whether their cooling will keep up, and start focusing on what really matters: delivering the compute power that’s driving tomorrow’s breakthroughs.
