How Data Center Cooling Drives 2026 Growth

The servers don’t care about the heatwave outside. But the economics of keeping them cold? That’s where the next wave of infrastructure investment is being won and lost.

Data center cooling has quietly become one of the most consequential capital expenditure decisions in modern infrastructure — and the numbers are starting to reflect it. When SPX Technologies (SPXC) reported results showing double-digit organic HVAC growth alongside accelerating data center revenue heading into 2026, it wasn’t a fluke. It was a signal. The companies positioned at the intersection of thermal management and digital infrastructure are about to have a very good run.

Here’s what that means for developers, investors, and infrastructure planners paying attention.

What Data Center Cooling Actually Is — and Why It's Gotten Complicated

Strip away the jargon, and data center cooling does one thing: it removes heat generated by computational equipment before that heat degrades performance or destroys hardware. Simple concept. Brutally complex execution.

A standard server rack generates somewhere between 5 and 20 kilowatts of heat. A modern AI-optimized rack — the kind being deployed at scale for large language model training and inference — can push 60 to 100+ kilowatts. That’s not a modest increase. That’s a categorically different engineering problem.

The shift to AI workloads hasn’t just increased cooling demand — it has invalidated the assumptions that most existing data center cooling infrastructure was built around.

Traditional raised-floor air cooling, the workhorse of the industry for decades, was designed for a world where heat loads were relatively predictable and evenly distributed. Dense GPU clusters don’t play by those rules. The heat is concentrated, intense, and variable depending on workload. Air — as a cooling medium — struggles to keep up at those densities without consuming enormous amounts of energy to do so.

This is why HVAC specialists like SPXC are seeing demand accelerate. The customers aren’t just building more data centers. They’re building fundamentally different ones, and the cooling systems have to follow.

Where the Industry Stands Right Now

The current state of data center cooling is best described as a transition period — one where multiple competing technologies are fighting for dominance, and no single solution has won.

Air cooling still handles the majority of deployed capacity globally. It’s proven, well-understood, and supported by a massive ecosystem of equipment manufacturers and service providers. But its efficiency ceiling is real. Power Usage Effectiveness (PUE) — the ratio of total facility power to IT equipment power — gets harder to optimize as rack densities climb.

Liquid cooling is where most of the R&D investment is flowing. Direct liquid cooling (DLC) runs chilled water or dielectric fluid directly to heat-generating components. Immersion cooling submerges servers entirely in thermally conductive fluid. Both approaches achieve heat transfer far more efficiently than air, with some immersion systems achieving PUE ratios approaching 1.03 — meaning nearly every watt consumed goes directly to computation rather than cooling overhead.

The sustainability dimension isn’t secondary here. Hyperscalers — Microsoft, Google, Meta, Amazon — have made public commitments around carbon neutrality and water usage that directly constrain their cooling choices. Google’s data centers, for instance, have used machine learning to optimize cooling efficiency, reportedly reducing cooling energy use by roughly 40% in some facilities. That kind of operational leverage makes the engineering investment pay off fast.

Regulatory pressure is coming too. The EU’s Energy Efficiency Directive now requires large data centers to report efficiency metrics publicly. That reporting requirement has teeth — it changes procurement conversations. When operators have to disclose their PUE numbers, suddenly the cost of cheap, inefficient cooling becomes visible.

Why 2026 Is the Inflection Year

SPXC’s 10.3% organic HVAC growth is meaningful precisely because it’s organic. Acquisitions can paper over weak underlying demand. Organic growth at double digits in an industrial segment signals real end-market pull.

The company flagged data center cooling as a headline catalyst heading into 2026, and the structural reasons behind that are worth understanding beyond the single earnings report.

Infrastructure planning cycles in the data center industry run 18 to 36 months from site selection to operational commissioning. The facilities that will come online in 2026 are being designed and contracted right now. That’s the pipeline HVAC suppliers are booking against — and the demand signals are exceptionally strong.

Several converging forces are compressing into the same window:

The AI infrastructure buildout isn’t slowing. Major cloud providers have telegraphed multi-year capital expenditure programs that dwarf previous investment cycles. Microsoft committed $80 billion in data center investment for fiscal year 2025 alone. Those facilities need cooling systems sized for AI workloads, not the previous generation of general-purpose compute.

Power constraints are paradoxically accelerating cooling technology investment. When grid capacity is limited, operators face pressure to maximize computational output per megawatt consumed. More efficient cooling directly translates to more compute capacity within a fixed power envelope — which means better cooling is now a competitive differentiator, not just an operating cost.

The geographic expansion of data center development beyond traditional hubs (Northern Virginia, Silicon Valley, Dublin, Singapore) into secondary markets — Phoenix, Columbus, Indianapolis, Warsaw — puts new thermal management demands on facilities that face more extreme ambient temperature variability. Cooling systems that work elegantly in the mild Pacific Northwest climate don’t just get transplanted into Texas heat without significant engineering adaptation.

What Successful Implementations Look Like

The operators who are getting this right share a few common characteristics.

Modular, scalable cooling architecture tops the list. Hyperscalers like Meta have publicly detailed their Open Compute Project approach, which treats cooling as a component to be optimized at the rack level rather than the building level. This granularity allows operators to match cooling capacity to actual workload requirements rather than overprovisioning for peak scenarios that may never materialize.

Equinix, operating over 240 data centers globally, has been deploying free cooling — using ambient outside air when temperatures allow — across facilities in cooler climates. The economics are compelling: in markets like Helsinki or Amsterdam, free cooling can operate effectively for the majority of the year, dramatically cutting mechanical cooling costs.

On the liquid cooling side, the early enterprise adopters are seeing operational data that’s shifting board-level conversations. One consistent finding: the upfront cost premium for liquid cooling infrastructure (typically 15-25% higher than comparable air-cooled buildouts) gets recovered through energy savings within three to five years at current electricity prices — and faster as power costs rise.

The lesson from early adopters isn’t that any single cooling technology wins universally. It’s that the operators who treated cooling as a strategic variable rather than a commodity specification made significantly better long-term infrastructure decisions.

What Infrastructure Developers Should Do Now

If you’re planning, financing, or developing data center infrastructure with a 2026 or beyond horizon, a few things are non-negotiable at this point.

Design for higher rack densities than your current tenant requirements suggest. The customers signing leases today will be running denser workloads within 24 months of occupancy. Infrastructure that can’t accommodate that transition will face expensive retrofits or lose tenants to facilities that can.

Build cooling system flexibility into the structural design. The battle between air, direct liquid, and immersion cooling isn’t resolved. Facilities that lock into a single approach at the building design stage are betting on a technology outcome that hasn’t been determined yet. Modular designs that can incorporate multiple cooling methodologies — or transition between them — command premium valuations.

Pay attention to what industrial HVAC suppliers are signaling through their order books and earnings guidance. When companies like SPXC report accelerating organic growth and call out data center cooling as a primary growth driver heading into 2026, that’s not marketing language. That’s demand visibility from the companies actually manufacturing and installing the systems. Follow the supply chain signals.

The data centers of 2026 will be defined less by their compute specifications than by their ability to manage heat at densities that would have seemed speculative three years ago. The operators and developers who understood that early — and built cooling infrastructure accordingly — are about to find out just how right they were.

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