Johnson Controls previews YORK YK-HT two-stage economized centrifugal chiller at AHR Expo, delivering energy, water and space savings
- High lift compressor enables the use of dry coolers in place of traditional cooling towers, eliminating water consumption entirely.
- Expanded operating range supports high temperature heat pump and heat recovery applications.
- Ultra-high condenser water temperature facilitates deployments of large data center campuses with fewer dry coolers, lower noise and water ‑ free operation.
- Compact single‑driveline design cuts failure points by 50%, and a nearly 30% smaller footprint eases legacy‑space retrofits, reducing cost, time and labor amid skilled‑labor shortages.
This extended operating range supports efficient closed‑loop heat rejection with dry coolers and enables heat‑pump and heat‑recovery applications. By reusing thermal energy that would otherwise be wasted, these systems can offset more than 35 MMBtu per hour, equivalent to the heating demand of approximately 350 single‑family homes per hour, while lowering carbon emissions and reducing energy costs.
"Water conservation, energy efficiency and decarbonization are priorities for our customers," said
These capabilities translate to significant real‑world impact on water and noise as well. For example, a typical 2,000‑ton chiller operating in
Beyond advanced heat‑rejection performance, the YK‑HT delivers expanded functionality in a single packaged unit. As a unified heating and cooling platform for large buildings, it can produce 44°F chilled water and 140°F hot water at the same time, a normal operating condition for heat pumps, while delivering efficiency levels that exceed ASHRAE requirements. This unified feature eliminates the need for cascaded systems, extra electrical infrastructure or major mechanical room redesigns. By using a single driveline and reducing rotating components by 50%, the YK-HT simplifies installation and service, while improving uptime, a critical advantage as data center operators face skilled-labor shortages. With a footprint nearly 30% smaller than most alternatives, the unit is well suited to fit more easily into existing legacy chiller spaces, helping reduce retrofit investment in cost, time and labor.
Other efficiency and performance features include:
- Low-GWP refrigerants R‑1234ze and R‑515B
- An integrated lubrication system and dual variable geometry diffuser control
- Flash tank economizer for enhanced efficiency
- Optional variable speed drives for increased efficiency and BESS compatibility
- Factory-equipped with Smart Ready connectivity for seamless integration
YK-HT chillers are tested against the most extreme real-world conditions, ensuring unmatched performance and reliability at the state-of-the-art Johnson Controls Advanced Development and Engineering Center (JADEC) in
To learn more, visit https://www.johnsoncontrols.com/events/ahr-2026.
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Kari Pfisterer
Direct: +1 414-217-1488
Email: kari.b.pfisterer@jci.com
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