Enhancing Data Center Cooling Efficiency: Why Companies Like Equinix Are Retrofitting Liebert/Vertiv EFC Units with Curtistech’s Z100 Nozzle

In the high-stakes world of data centers, where every kilowatt of power and drop of water counts toward operational costs and sustainability goals, cooling systems are mission-critical. Hyperscale operators like Equinix, which manage some of the world’s largest colocation facilities, are constantly seeking ways to squeeze more efficiency out of their existing infrastructure without massive capital overhauls. One increasingly popular solution? Retrofitting legacy Liebert/Vertiv evaporative free cooling (EFC) units with the Z100 nozzle from Curtis Technologies (Curtistech).

This simple yet powerful upgrade is delivering measurable gains in heat transfer efficiency, water conservation, and maintenance reduction—benefits that align perfectly with the industry’s push toward lower PUE (Power Usage Effectiveness) and reduced environmental impact.

The Challenge with Traditional Liebert/Vertiv EFC Cooling

Liebert/Vertiv EFC units have long been workhorses in data center thermal management. These evaporative systems use water sprayed over heat exchange media or coils to achieve free cooling, leveraging the natural process of evaporation to reject heat far more efficiently than mechanical refrigeration alone.

However, the original spray nozzles in many of these older units have limitations. Over time, they can produce inconsistent droplet sizes, leading to excessive water drift (carryover of fine mist into the airstream), higher water consumption, and more frequent clogging from mineral buildup. Operators face higher makeup water costs, increased risk of scaling or corrosion, and unplanned downtime for nozzle cleaning or replacement.

Enter the Curtistech Z100 1" nozzle—a purpose-built retrofit solution designed specifically for demanding data center environments.

How the Z100 Nozzle Delivers Superior Performance

The Z100 is engineered for direct drop-in compatibility with Liebert/Vertiv EFT units, making retrofits straightforward and cost-effective. Data center teams report quick installations with minimal disruption to operations.

Key advantages highlighted by adopters include:

- Larger, More Uniform Droplet Size for Better Heat Transfer
  Unlike traditional nozzles that atomize water into ultra-fine mist, the Z100 produces consistently larger droplets. This optimized size improves contact time and coverage across the evaporative media or coils, enhancing overall heat rejection efficiency. The result? More effective evaporative cooling without the energy penalty of over-spraying or running supplemental mechanical systems.

- Significantly Reduced Water Drift 
  Finer droplets from older nozzles are easily entrained in high-velocity airflow and carried out of the unit as drift loss. The Z100’s larger droplets have greater mass and momentum, causing them to fall and evaporate within the intended zone rather than escaping. Operators like those at Equinix facilities report substantially lower water carryover—translating to reduced water treatment chemical use, lower makeup water demand, and compliance with stricter drift-elimination standards.

- Low-Maintenance Design That Runs Cleaner, Longer
  One of the biggest pain points with conventional nozzles is frequent cleaning. Mineral deposits and debris quickly clog small orifices, degrading performance and requiring scheduled shutdowns. The Z100’s robust, clog-resistant design minimizes buildup, meaning far less frequent maintenance cycles. Facilities report going months longer between inspections, freeing up technician time and reducing operational interruptions.

These improvements compound: better heat transfer lowers fan and pump energy use, reduced drift cuts water and chemical costs, and extended maintenance intervals boost overall uptime and ROI.

Real-World Adoption by Leading Operators

Equinix and similar hyperscale and colocation providers have been early adopters of this retrofit strategy. In an industry where even small percentage gains in efficiency can save millions annually across a global footprint, the Z100 nozzle offers a low-risk, high-reward path to modernization.

By retrofitting existing Liebert/Vertiv EFC units rather than rip-and-replace, these companies avoid the downtime, permitting delays, and capital expense of full system overhauls while still achieving next-generation performance. Early case studies show improvements in water efficiency metrics and reduced maintenance budgets—critical advantages as data centers scale to meet AI-driven demand.

Curtistech’s focus on data-center-specific applications (the Z100 is also used by other leading evaporative cooling OEMs like Munters in their Oasis systems) ensures the nozzle meets the stringent reliability, corrosion resistance, and flow uniformity requirements of 24/7 mission-critical environments.

Why This Matters for the Future of Data Center Cooling

As data centers grapple with rising power densities, water scarcity concerns in certain regions, and aggressive ESG targets, retrofits like the Z100 nozzle exemplify “smart modernization.” They extend the life of proven Liebert/Vertiv platforms while delivering the efficiency gains operators need today.

For facility managers evaluating cooling upgrades, the math is compelling: lower water usage, reduced energy for heat rejection, and dramatically lower maintenance overhead—all without sacrificing the redundancy and reliability Vertiv systems are known for.

If your organization operates Liebert/Vertiv EFT units and is looking for quick wins in efficiency and sustainability, the Curtistech Z100 nozzle deserves a close look. A targeted retrofit could be the easiest path to cooler, greener, and more cost-effective operations.

Ready to explore a Z100 retrofit for your facility? Reach out to Curtistech.com or your Vertiv partner for a site assessment. The future of efficient data center cooling doesn’t always require new equipment—it sometimes just needs the right nozzle.