Beyond the tower

The shift we’re all feeling

Data centers, pharmaceutical facilities, hospitals and advanced manufacturing lines are growing in size. Mandates are tightening around heat density, water scarcity, noise limits and decarbonization. At the same time, operators face a very practical reality: capital and space are limited, skilled labor is tight, and retrofits must happen within legacy mechanical rooms without disrupting uptime. The tension is real. And it’s reshaping how mission‑critical campuses think about heat rejection, heat recovery, and the role a single machine can play in both cooling and heating.

To meet that shift, Johnson Controls has launched the YORK® YK‑HT , a new two stage centrifugal chiller designed specifically for these demanding applications. Publicly shown for the first time at AHR Expo 2026, the YK‑HT is designed for the very facilities facing these mounting challenges: large data centers, industrial and pharmaceutical campuses, and hospitals that require reliable performance under demanding operating conditions. With a high‑lift compressor and an expanded operating range that supports dry‑cooler‑based, closed‑loop heat rejection, the YK‑HT opens the door to water‑free operation, which is a major advantage for sites constrained by water availability or sustainability targets.

This article explains what’s different about YK‑HT, how it maps to real‑world constraints in mission‑critical and industrial settings, and why facility teams planning multi‑megawatt expansions should consider its implications for water, energy, carbon and space.

Why “high lift” matters now

In conventional plant designs, cooling towers are the default heat sink for large water‑cooled chillers. They’re highly effective, but they require millions of gallons per year. They also introduce site noise from high‑horsepower fans, which are increasingly constrained on hyperscale and health‑care campuses as well as in water‑stressed geographies. By contrast, dry coolers reject heat to ambient air with no process water and typically offer lower maintenance complexity. Historically, the catch has been thermodynamics. To move the same heat through a dry cooler year‑round – especially on hot days – the chiller must support higher leaving‑condenser fluid temperatures and larger lift (temperature difference between evaporator and condenser).

This is precisely where YK‑HT’s design changes the calculus. The machine is engineered to operate with condenser leaving fluid temperatures up to 165°F and lift up to 110°F. This expanded range creates a wider condenser‑side window for closed‑loop, water‑free operation and unlocks heat‑pump and heat‑recovery duty from the same driveline. For campuses facing both water risk and electrification goals, the ability to reuse thermal energy that would otherwise be discarded is strategically significant. In the representative scenarios cited by Johnson Controls, such systems can offset more than 35 MMBtu per hour – roughly the heating demand of 350 single‑family homes.

From boiler rooms to AI halls: use cases that win

Data centers. High‑density halls and “AI factories” face three converging constraints: water, noise and speed to scale. A high‑lift, water‑free chiller configuration reduces onsite water reliance and can materially cut the number of dry coolers required – Johnson Controls reports up to 60% reduction in some large data center deployments. Fewer fans operating at lower speeds can reduce acoustic impact by as much as 20 dBA: a significant benefit in campuses adjacent to urban or mixed‑use zones.

Healthcare and pharma. Sterile production and hospital steam/hot‑water demands create constant thermal loads. With a chiller that can simultaneously produce chilled water and medium-temperature hot water, facilities can recover process heat that once went up the cooling tower, offset boiler fuel, and advance Scope 1/2 decarbonization without an elaborate cascade of specialty machines.

Industrial campuses. In process cooling and campus‑wide district systems, dry‑cooler loops simplify water management and help operators avoid chemical treatment programs, drift/legionella risk and seasonal tower maintenance. A chiller designed to span cooling, heat recovery and medium-temperature heat pump modes provides seasonal flexibility while keeping the plant architecture legible for operations teams.

For a broader view of YORK® solutions purpose‑built for mission‑critical environments, Johnson Controls highlights data‑center‑specific portfolios – from chillers to CRAHs – that are engineered to align with uptime and sustainability requirements. The YK‑HT’s capabilities fit neatly into that trajectory.

Procurement and retrofit realities: single driveline, smaller footprint

Facility leaders often ask: “How is this going to fit in my mechanical room – and who’s going to maintain it?” The YK‑HT addresses both questions with a compact single‑driveline design that reduces rotating components by 50% compared to multi‑driveline approaches and delivers a nearly 30% smaller footprint. For brownfield projects, that translates into a higher probability of reusing legacy chiller pads and navigating rigging constraints without structural modifications. Fewer components can also simplify service and improve uptime – a key lever when skilled labor is scarce, and maintenance windows are tight.

Water, noise and neighborhood impact

To appreciate the water impact in plain numbers: a typical 2,000‑ton tower‑cooled chiller in a hot‑dry location such as Las Vegas can consume 8–9 million gallons of cooling‑tower water annually. With the YK‑HT paired to dry coolers, that process water use is eliminated. For mission‑critical campuses operating in municipalities with tightening water allocations – or in regions where water rights are vigorously contested – this is more than an engineering preference; it’s a site enablement strategy. The noise reduction potential (up to ~20 dBA) when fewer dry coolers run at lower fan speeds directly supports permitting and community relations, especially where nighttime noise curfews are enforced.

What “unified heating and cooling” looks like on the floor

Beyond heat rejection, the YK‑HT is positioned as a unified heating‑and‑cooling platform. In standard operation, it can produce ~44°F chilled water and ~140°F hot water simultaneously – a typical heat‑pump operating condition – exceeding ASHRAE efficiency requirements. In practical terms, one machine in simultaneous mode can cool the IT load and supply reheat or process hot water in the same hour. This reduces the need for separate cascaded heat‑pump trains, extra electrical feeders or a major mechanical room redesign. It also makes the technology particularly attractive in retrofits and expansions where both space and downtime are dear.

Inside the package: technology choices that broaden the window

Several technology selections in the YK‑HT contribute to its wider operating envelope and practical integration:

• Two‑stage economized compression with a flash tank economizer to improve efficiency at high lift
• Dual variable geometry diffuser control to stabilize operation across changing conditions
• Low‑GWP refrigerant options (R‑1234ze and R‑515B) aligned with global refrigerant transitions and corporate sustainability commitments
• Optional VSDs and BESS (battery energy storage system) compatibility to support demand management and grid‑interactive strategies
• Integrated lubrication system, Smart Ready connectivity for seamless controls integration, and factory testing at Johnson Controls’ Advanced Development and Engineering Center (JADEC) in New Freedom, PA
• Global manufacturing and service support slated for San Antonio, Texas

Implementation guidance: getting from concept to commissioning

1) Start with the sink
If your primary drivers are water elimination and noise reduction, model the dry‑cooler array first – fan power, approach temperatures, and seasonal performance. Use that to define the condenser water (or glycol) temperature program the chiller must meet. With 165°F condenser leaving fluid and 110°F lift capability, YK‑HT can support higher setpoints that reduce dry‑cooler count or fan speed, but local climate and redundancy standards will still drive the final array size.

2) Quantify heat recovery value
Estimate your hourly and seasonal hot‑water load by temperature tier (e.g., 120–140°F for reheat/process wash‐down vs. 150–165°F for specialized processes). The cited >35 MMBtu/hr heat‑recovery potential is scenario‑dependent; align reclaimed heat with a real load to maximize boiler offset and justify electrification investment.

3) Right‑size the electrical plan
A single driveline with optional VSDs and BESS compatibility enables demand‑limiting strategies during peak pricing or curtailment events. Coordinate with your utility on demand response incentives and interconnection requirements.

4) Plan the retrofit path
Leverage the ~30% footprint reduction to fit within legacy bays where possible. Fewer rotating components can simplify spares strategies and training for in‑house techs, but early engagement with factory service and commissioning teams still pays dividends in schedule and risk management.

5) Align controls early
“Smart Ready” connectivity simplifies integration, but be sure to capture the simultaneous heating/cooling controls narrative in your Basis of Design. This means defining priorities when cooling load drops but heating demand persists (and vice versa), and how to dispatch supplemental heat during extreme conditions.

Sustainability outcomes you can measure

Every organization’s carbon math is different, but three categories of impact are common across projects:

• Water stewardship. Moving from towers to dry coolers converts a variable, consumptive resource (make‑up water) into an electrical one (fan power) and can eliminate millions of gallons/year at chiller‑plant scale. This can help reduce risk and chemical use while improving public reporting narratives.
• Scope 1 reductions via electrified heat. Using reclaimed heat and medium-temperature heat‑pump operation to offset boiler runtime lowers onsite combustion. Combustion is often the largest single lever for Scope 1 in healthcare and campus‑style portfolios.
• Scope 2 efficiency & grid interaction. High‑lift operation with VSDs and BESS compatibility supports load shaping. This enables plants to chase off‑peak pricing and respond to grid signals, especially in markets with time‑of‑use rates or demand charges.

A note on the mission‑critical continuum

In a world where IT loads spike unpredictably and clinical procedures never wait, the plant you design must remain stable under disturbance. That’s why the YK‑HT’s performance claims are backed by factory testing at JADEC (New Freedom, PA), and why Johnson Controls ties the product to a global manufacturing and service footprint (San Antonio, TX and Wuxi). For operators, the promise is new thermodynamic territory, known service pathways and parts logistics – the practical backbone of uptime.

The bottom line

The YORK® YK‑HT doesn’t merely “make do” without a tower. It re‑frames how a single centrifugal machine can cool, recover heat, and deliver medium-temperature water – all in a compact, single‑driveline package designed for the realities of today’s campuses. For data centers expanding under water and noise constraints, for hospitals and pharma facilities seeking electrified heat without wholesale plant rebuilds, and for industrial campuses aligning with decarbonization roadmaps, the YK‑HT sketches a clear path forward:

• Water‑free heat rejection through dry coolers, with the high‑lift envelope to make it practical all year.
• Actionable heat recovery that turns waste into usable energy at meaningful scale.
• Simplified mechanicals – fewer rotating parts, smaller footprint – fit for retrofits and lean service teams.
• Controls‑ready electrification prepared for grid‑interactive operation and low‑GWP refrigerants.

In other words, the YORK® YK‑HT delivers a wider operating window through one driveline and one machine. It helps you solve for water, carbon, noise and space without compromising reliability. For organizations planning the next decade of growth, it’s an option worth modeling in your next plant narrative.

FAQs

What makes the YORK® YK‑HT different from a conventional centrifugal chiller?

YK‑HT is engineered for high‑lift operation. It enables water‑free heat rejection through dry coolers and allows one machine to deliver cooling, heat recovery and medium‑temperature heat pump operation.

Can YK‑HT support both heating and cooling at the same time?

Yes. YK‑HT can produce chilled water and hot water simultaneously. This enables efficiency gains and boiler‑offset opportunities across healthcare, data center and industrial applications.

How much water can a dry‑cooler‑based YK‑HT design save?

Replacing a cooling tower in a 2,000‑ton plant can eliminate 8–9 million gallons of annual process water use, depending on climate and load profile.