Home / Themes / Data Centers '25: HVAC & Air Cooling

Data Centers '25: HVAC & Air Cooling (open on stockthemes)

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Theme thesis · 3/5 sections · Tickers 4 with notes · 6 pending

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Bull / Bear Details has the investment thesis and bull/bear points. Overview is monitoring guidance (hiring, forums, second-order trends, search keywords, Google Trends, datasets).

Bull / Bear Details

Surging AI compute densities and hyperscale capex are driving multiyear order backlogs for high-capacity chillers, air handlers, and facility-level heat rejecti

Thesis

Surging AI compute densities and hyperscale capex are driving multiyear order backlogs for high-capacity chillers, air handlers, and facility-level heat rejection. Even with direct-to-chip liquid cooling adoption, hybrid architectures require massive air-side infrastructure, creating sustained pricing power and high-margin service expansion for applied HVAC leaders.

Bull case

  • Hyperscale and AI capex expansion drives unprecedented demand for mission-critical thermal equipment. Surging cluster sizes and mega-campus developments require record volumes of high-capacity air- and water-cooled chillers, custom computer-room air handlers (CRAH), and modular heat-rejection systems, extending equipment backlogs across applied HVAC suppliers.

  • Tightening energy efficiency mandates and water-usage intensity (WUE) caps accelerate adoption of higher-value cooling systems. Municipal resistance to evaporative water consumption and stringent PUE targets push operators toward closed-loop adiabatic dry coolers, intelligent free-cooling economizers, and variable-speed chiller controls, lifting equipment content and pricing per megawatt.

  • Hybrid thermal architectures solidify enduring air-side infrastructure requirements alongside liquid cooling. While direct-to-chip liquid cooling handles high-TDP processor loads, remaining server electronics, networking fabric, power delivery, and facility loops still require heavy air handling and central heat rejection, expanding total thermal addressable market rather than cannibalizing it.

Bear case

  • Accelerating adoption of direct-to-chip and immersion liquid cooling threatens to displace traditional room-level air handlers. If hyperscalers increasingly bypass white-space air conditioning in favor of direct liquid loops and enclosed rack systems, legacy CRAH/CRAC equipment demand could contract more rapidly than consensus expects.

  • Rapid manufacturing capacity additions and expanding industry footprint could erode pricing power. As major applied HVAC and industrial players aggressively build out dedicated data-center chiller and air-handling production lines, eventual normalization of hyperscale delivery schedules risks overcapacity, margin compression, and commoditization of modular units.

  • Grid interconnection bottlenecks, power shortages, and project execution delays create revenue timing volatility. Severe delays in utility substation delivery, municipal permitting, and localized supply chain shortages frequently push data-center commissioning timelines to the right, causing lumpy quarterly order conversion and inventory buildup.

Overview

Hiring Trend Watchpoints

High-performing operators are aggressively expanding skilled manufacturing labor, commissioning technicians, and field service engineers across specialized thermal production hubs (e.g., Modine in Jefferson City, MO, and Franklin, WI; AAON/BASX in Redmond, OR, and Longview, TX; Vertiv in North America, EMEA, and Johor, Malaysia). Job postings reflect acute demand for commercial refrigeration mechanics, low-GWP refrigerant certified technicians (EPA Section 608), fluid-loop plumbing specialists, and controls/BMS software engineers. Theme execution is confirmed by expanding assembly headcounts, factory utilization rates exceeding 75% at newly commissioned chiller lines, and rapid additions to high-margin recurring field-service teams. Deterioration would be signaled by technician hiring freezes, delayed project commissioning due to persistent skilled-trade shortages, or spikes in voluntary turnover among certified service personnel.

Forum Watchlist

  • reddit — r/HVACHigh

    Commercial chiller reliability, lead times for centrifugal compressors, low-GWP refrigerant field issues, and field technician labor constraints

  • reddit — r/datacenterHigh

    Data hall thermal management, CRAH/CRAC operational failures, air/liquid hybrid deployment challenges, and facility PUE target compliance

  • forum — HVAC-Talk.comHigh

    Industrial chiller installations, York/Trane/Carrier equipment field feedback, pump skid integration, and factory delivery lead times

  • reddit — r/sysadminMedium

    Server room hot-spot alerts, facility-level thermal throttling, and cooling downtime incidents during peak summer heatwaves

  • reddit — r/dataengineeringMedium

    Compute cluster downtime chatter, facility migrations due to cooling bottlenecks, and colocation infrastructure performance complaints

Industry Publications

  • Data Center Dynamics (datacenterdynamics.com) — Premier global trade outlet covering hyperscale facility construction, chiller contract awards, and large-scale data center thermal architecture deployments.
  • Data Center Knowledge (datacenterknowledge.com) — In-depth technical reporting on mission-critical facility engineering, CRAH/chiller selection, and air-liquid hybrid cooling strategies.
  • ACHR News (achrnews.com) — The authoritative HVACR industry publication tracking commercial chiller production trends, manufacturer order backlogs, and refrigerant regulatory shifts.
  • Mission Critical Magazine (missioncriticalmagazine.com) — Specialized coverage of mission-critical power and cooling infrastructure, facility PUE optimization, and data hall heat rejection systems.
  • Cooling Post (coolingpost.com) — Global news source focused on industrial cooling, chiller technology developments, A2L refrigerant compliance, and heat exchangers.

Second Order Trends

1. Hybrid Thermal Split and Chiller Plant Expansion: Even as direct-to-chip (DTC) liquid cooling handles 70-80% of accelerator heat, the remaining 20-30% of server heat (DIMMs, VRMs, power supplies) still radiates into the room, requiring high-capacity computer room air handlers (CRAH). Simultaneously, DTC coolant distribution units (CDUs) dump heat into chilled-water loops, driving larger external chiller installations rather than replacing them. 2. Water-Usage Effectiveness (WUE) Backlash Driving Closed-Loop Dry Coolers: Municipal water restrictions and community pushback across major data center corridors (e.g., Phoenix, Northern Virginia, Western Europe) are accelerating a migration away from evaporative cooling towers toward closed-loop adiabatic dry coolers and zero-water chillers, materially increasing mechanical dollar content per megawatt. 3. Low-GWP / A2L Refrigerant Transition: Mandates phasing out HFC refrigerants under the AIM Act and EU regulations are forcing data center operators to deploy chillers using next-generation A2L and natural refrigerants (such as R-454B, R-1234ze, and R-32), requiring redesigned compressors, safety isolation systems, and factory-engineered applied equipment. 4. Prefabricated Modular Cooling Skids: Hyperscalers are contracting construction schedules from years to months, fueling demand for prefabricated chiller plants, modular pump houses, and pre-packaged CRAH/AHU units (e.g., BASX, Airedale, and Vertiv Modular Solutions) that shift complex field installation into factory-controlled manufacturing environments.

Search Keywords Brand Product

  • Airedale chillers
  • YORK chillers
  • Trane CenTraVac
  • Carrier AquaForce
  • BASX air handlers
  • Liebert CRAH
  • Vertiv CoolLoop
  • Marley cooling towers
  • Munters Oasis
  • Silent-Aire AHU
  • Liebert Trim Cooler
  • Scott Springfield AHU
  • Motivair CDU
  • Airedale SmartCool
  • Trane Stealth
  • YORK YVAA
  • Daikin Applied Pathfinder
  • Liebert CW
  • Carrier QuantumLeap
  • Donaldson Torit
  • data center cooling
  • data center HVAC
  • air-cooled chillers
  • computer room air handler
  • CRAH units
  • chilled water loop
  • data center heat rejection
  • hybrid air liquid cooling
  • data center PUE
  • adiabatic dry coolers

Search Keywords Policy Regulatory

  • AIM Act HFC phasedown
  • ASHRAE TC 9.9 guidelines
  • EU Energy Efficiency Directive data centers
  • data center water usage regulations
  • PUE mandate
  • low-GWP refrigerant transition

Search Keywords Event Phrases

  • OCP Global Summit
  • Data Center World
  • ASHRAE Winter Conference
  • Advancing AI Thermal Summit
  • NVIDIA GTC

Google Trend Product Category Intent

• data center chiller • data center HVAC • computer room air handler • CRAH unit • data center cooling system • dry cooler data center

Google Trend Consumer Intent

• how are data centers cooled • AI data center electricity and water • data center cooling energy consumption • liquid cooling vs air cooling data center

Google Trend Macro Policy Terms

• data center water consumption • data center PUE • data center power usage effectiveness • data center environmental impact

Economic Data Watch

1. U.S. Census Bureau / FRED — Value of Construction Put in Place Survey (VIP)

Matchedfred · access=api · map_only

Metric/field TLNRESCONS (Total Construction Spending: Nonresidential in the United States, SAAR, Millions of Dollars)

Cadence monthly

Why it matters Tracks macro physical construction spending across nonresidential sectors, including data centers, indicating overall demand for HVAC and cooling equipment.

Signal to watch Increasing values indicate a robust construction environment, favorable for cooling equipment demand.

Confidence: high

2. Federal Reserve Board / FRED — Industrial Production Index

Matchedfred · access=api · map_only

Metric/field INDPRO (Industrial Production Index)

Cadence monthly

Why it matters Reflects overall manufacturing output, which can indicate demand for industrial HVAC and the broader economic health impacting data center investments.

Signal to watch Rising index suggests stronger industrial activity and potential for increased demand.

Confidence: high

3. EIA / FRED — Electric Power Monthly

Matchedfred · access=api · map_only

Metric/field EMM_EPPD_PCLM_NUS_CENTS_PER_KWH (Industrial Sector Electricity Price, U.S. Average, Cents per Kilowatt-hour)

Cadence monthly

Why it matters Rising electricity costs incentivize data centers to invest in more efficient cooling solutions, a key theme driver.

Signal to watch Increasing prices suggest greater urgency for efficiency upgrades.

Confidence: high

4. Federal Reserve Board / FRED — Federal Funds Rate

Matchedfred · access=api · map_only

Metric/field DFF (Effective Federal Funds Rate)

Cadence monthly

Why it matters Influences borrowing costs for large capital projects like data centers, impacting investment decisions and project timelines.

Signal to watch Lowering rates could stimulate investment; rising rates could slow it.

Confidence: high

5. SIA — World Semiconductor Trade Statistics (WSTS)

Matched (medium)semi_semiconductor_equipment_billings · access=file · map_only

Metric/field Global Semiconductor Sales (Monthly, $B)

Cadence monthly

Why it matters A proxy for overall demand for chips, especially AI chips, which directly drives the need for data center expansion and cooling infrastructure.

Signal to watch Sustained growth in sales indicates strong underlying demand for computing infrastructure.

Confidence: high

Free Alt Data Watch

1. Indeed Hiring Lab — Job Postings

Matched (medium)engine_advertising_brand_tracking · access=file · map_only

Metric/field Job postings for 'data center cooling engineer' or 'HVAC technician' (by company: Modine, Vertiv)

Cadence daily

Why it matters Tracks hiring trends for specialized labor in the data center cooling sector, indicating operational scaling and demand for skilled personnel.

Signal to watch Increasing job postings suggest expansion and strong demand for talent.

Confidence: high

2. Google Trends — Search Interest

Not in registry

Metric/field Search interest for 'data center liquid cooling' and 'chilled water loop data center'

Cadence daily

Why it matters Measures public and industry interest in key data center cooling technologies, reflecting evolving market focus and adoption trends.

Signal to watch Rising search interest indicates increasing awareness and potential demand for these solutions.

Confidence: high

3. Reddit — Subreddit Activity

Matched (medium)engine_advertising_brand_tracking · access=file · map_only

Metric/field Post volume and sentiment in r/dataengineering related to 'infrastructure bottlenecks' or 'downtime'

Cadence daily

Why it matters Provides anecdotal insights into real-world operational challenges and pain points faced by data center operators, which can drive demand for better cooling solutions.

Signal to watch Increased chatter about cooling-related issues could signal unmet demand for robust thermal management.

Confidence: medium

4. PJM Interconnection — Interconnection Queue

Not in registry

Metric/field New data center load requests (MW) in the PJM interconnection queue

Cadence monthly

Why it matters Tracks planned large-scale power consumption, often associated with new data center builds, providing a forward-looking indicator of demand for infrastructure.

Signal to watch Increasing MW requests signal strong future data center development.

Confidence: high

5. U.S. Census Bureau — Monthly U.S. Heating and Cooling Equipment Shipments (AHRI)

Not in registryaccess=api

Metric/field Commercial Unitary Air Conditioners and Heat Pumps Monthly Shipments (Total Units and YoY % Change)

Cadence monthly

Why it matters Leading independent industry barometer for commercial HVAC equipment, a segment relevant to data center cooling, indicating overall market health.

Signal to watch Positive YoY growth suggests robust demand in the commercial HVAC sector, which includes data center-related equipment.

Confidence: high

Paid Alt Data Watch

1. Industrial Info Resources (IIR) — Global Data Center Project Database

Not in registry

Metric/field Data Center Project Milestone Tracking: Mechanical & HVAC Contract Awards (Capacity MW, Total Mechanical Investment USD, and Awarded Equipment Vendor Names)

Cadence weekly

Why it matters Tracks verified project awards and investments in data center thermal infrastructure, providing granular insights into demand and competitive wins.

Signal to watch Increasing contract awards and investment values indicate strong project pipeline and market activity.

Confidence: high

2. Dell'Oro Group — Data Center Physical Infrastructure Market Share Report

Matcheddell_oro_group_network_equipment_market_share · access=file · map_only

Metric/field Market share by vendor for Data Center Cooling (e.g., Chillers, CRAC/CRAH, Liquid Cooling)

Cadence quarterly

Why it matters Provides competitive intelligence on market leadership and shifts in demand for specific cooling technologies and vendors.

Signal to watch Changes in market share can indicate competitive strength or weakness among theme constituents.

Confidence: high

3. IDC — Worldwide Quarterly Data Center Infrastructure Tracker

Matched (medium)idc_technology_shipments_market_share · access=file · map_only

Metric/field Data Center Thermal Management Market Size and Forecast (Revenue, Units)

Cadence quarterly

Why it matters Offers comprehensive market sizing, growth rates, and forecasts for the overall data center thermal management market, validating the theme's growth trajectory.

Signal to watch Upward revisions in market size and growth forecasts reinforce the investment thesis.

Confidence: high

4. Thinknum — Job Postings

Not in registryaccess=file

Metric/field Job postings for manufacturing and production roles at Modine's Jeff City, MO, and Franklin, WI facilities (30-day growth)

Cadence daily

Why it matters Provides granular, real-time insight into Modine's capacity expansion and operational ramp-up, crucial for meeting data center demand.

Signal to watch Consistent growth in relevant job postings indicates successful capacity build-out and increased production.

Confidence: high

5. FreightWaves — SONAR Ocean Freight Rates and Volumes

Matchedfreightwaves_freight_rates_capacity · access=file · map_only

Metric/field Container spot rates (e.g., FBXD.CNAW) and TEU volumes for key trade lanes (e.g., Asia-North America)

Cadence daily

Why it matters Monitors global supply chain health and logistics costs, which can impact manufacturing and delivery of HVAC and cooling equipment components.

Signal to watch Stable or declining rates and consistent volumes suggest a healthy and predictable supply chain environment.

Confidence: high

Prediction Market Watch

1. US private data center construction spending in September (September 2026)

Kalshi · Confidence: high

Not in registryaccess=api

Market https://kalshi.com/markets/kxdatacentcon

Why it matters Increased private data center construction spending directly indicates a strong pipeline for new cooling equipment orders for companies like Modine, Vertiv, Carrier, and Trane Technologies, which are core constituents of this theme.

Series key us_private_dc_construction_spending

2. Will data center power-cost standards become law? (Before Jul 1, 2027)

Kalshi · Confidence: high

Not in registryaccess=api

Market https://kalshi.com/markets/kxratepayerlaw

Why it matters A law increasing data center power costs would incentivize hyperscalers and other operators to invest in more energy-efficient cooling solutions, such as high-efficiency chillers, free cooling, and advanced controls, directly benefiting companies in this theme that offer such products.

Series key dc_power_cost_standards_law

3. Will Tennessee regulate data center water use? (Before Aug 1, 2027)

Kalshi · Confidence: high

Not in registryaccess=api

Market https://kalshi.com/markets/kxlocallaw

Why it matters Regulation of data center water use would accelerate the demand for water-efficient and near-zero water cooling solutions (e.g., dry coolers, adiabatic coolers, closed-loop systems), directly benefiting companies offering these technologies, such as Vertiv (PurgeRite) and Modine (Airedale), which are key theme constituents.

Series key tn_dc_water_use_regulation

Theme Plain English
This theme captures suppliers of mission-critical thermal management equipment keeping AI and cloud data centers operational. While high-density AI accelerators increasingly use direct-to-chip liquid cooling, total facility thermal management still requires massive air-side and chilled-water infrastructure. The exposure spans high-capacity chillers, computer room air handlers (CRAH), modular air-handling units, cooling towers, and dry coolers that reject heat out of the building envelope, ensuring continuous uptime, lower power usage effectiveness, and reduced water consumption.
Upcoming Catalysts9 rows
Catalyst IDEstimated TimingEstimated Date StartEstimated Date EndCatalystWhy It MattersTicker Or Theme SpecificTranscript DateSource TypeCatalyst Source
MOD_ab639094before the end of the calendar year2026-06-032026-12-31Completion of the spin-off of Modine's Performance Technology segment and its merger with Gentherm, pending SEC and shareholder approvals, and an IRS determination letter.This strategic action will allow Modine to focus on higher-growth businesses, potentially improving its valuation and investor sentiment, and will lead to an updated full-year outlook for the remaining business.Ticker2026-05-26earnings_transcriptMOD (ticker)
MOD_01e5ca02in fiscal 272026-07-012027-03-31Modine's ability to successfully pass through and recover higher material costs and tariffs, including the new 32 aluminum tariffs, through pricing adjustments and surcharges.Successful recovery is expected to drive margin improvement across all three business segments in fiscal 2027, significantly impacting profitability and investor sentiment.Ticker2026-05-26earnings_transcriptMOD (ticker)
MOD_b8f034ebby the end of the fiscal year2026-04-012027-03-31Modine completing the ramp-up of its data center production capacity, effectively doubling the current operational capacity by the end of fiscal year 2027.This milestone is critical for meeting the strong demand from existing and new data center customers, including the $4 billion LTA, and achieving the aggressive data center revenue growth targets.Ticker2026-05-26earnings_transcriptMOD (ticker)
MOD_8e015535ongoing, long-term2026-06-032029-12-31Modine securing additional long-term capacity agreements (LTAs) with other hyperscale data center customers beyond the recently announced $4 billion LTA.Such agreements would further de-risk future revenue streams, provide greater visibility into demand, and potentially necessitate further capacity investments, reinforcing Modine's position in the hyper-growth data center market.Ticker2026-05-26earnings_transcriptMOD (ticker)
MOD_99fa8903expected to rebound in fiscal 272026-04-012027-03-31The Scott Springfield commercial HVAC business achieving a strong recovery in fiscal 2027 after being negatively impacted by tariffs in the prior year.A rebound in this segment would contribute to the overall commercial HVAC growth and profitability, diversifying revenue streams within the Climate Solutions segment.Ticker2026-05-26earnings_transcriptMOD (ticker)
VRT_eaa28596second half this year launches of portfolio2026-07-012026-12-31Launch of Vertiv's 800-volt architecture product portfolio.The successful introduction of 800-volt products is crucial for Vertiv to maintain its leadership and capture market share in the rapidly evolving high-density AI data center segment, expanding its addressable market.Ticker2026-04-22earnings_transcriptVRT (ticker)
VRT_c7ea5f9bcontinue to materially offset those2026-04-012026-12-31Successful mitigation of tariff exposures, including recent changes under Section 122 and 232.Effective tariff countermeasures are essential for protecting Vertiv's adjusted operating margins and achieving its profitability guidance amidst evolving trade dynamics.Ticker2026-04-22earnings_transcriptVRT (ticker)
VRT_b01bf2f8second half2026-07-012026-12-31EMEA returning to year-over-year sales growth.A recovery in EMEA sales would validate management's confidence in the region's demand trajectory, contributing to overall revenue growth and mitigating concerns about regional weakness.Ticker2026-04-22earnings_transcriptVRT (ticker)
MOD_8f9713efsome ramp beginning in Q42027-01-012027-03-31Modine beginning to recognize revenue from the $4 billion long-term capacity locking agreement for data center cooling products in fiscal Q4 2027.This marks the start of a significant revenue stream with high visibility, validating the capacity expansion investment and providing strong top-line growth for calendar years 2027-2029.Ticker2026-05-26earnings_transcriptMOD (ticker)

Constituents

  • — AAON, Inc.
  • MODT3
    — Modine Manufacturing Company
  • TTT3
    — Trane Technologies plc
  • VRTT3
    — Vertiv Holdings Co
  • 6367.TT3
    · no notes yet
  • CARRT3
    · no notes yet
  • DCIT3
    · no notes yet
  • JCIT3
    · no notes yet
  • MTRS.STT3
    · no notes yet
  • SPXCT3
    · no notes yet