Data center cooling has emerged as a distinct $4B+ addressable market with 60-500% order and revenue growth -- liquid cooling adoption is accelerating faster than expected as power density forces a technology transition from air to liquid

Data center cooling has broken out from a sub-segment of HVAC into a standalone multi-billion dollar market. MOD is reporting 60%+ data center cooling order growth. Carrier's data center orders are up 500%. AAON is signing multi-year capacity lock-up agreements. Trane Technologies has NVIDIA reference design partnerships. Eaton is building cooling platforms. The HVAC incumbents are acquiring their way into liquid cooling: Ecolab acquired CoolIT (growing 'well ahead of 30%+'), and KKR sold CoolIT at 15x cost, validating the market's trajectory. The technology transition is being forced by physics. Each GW of AI compute requires dedicated cooling infrastructure at densities 5-10x traditional enterprise data centers. Chemours completed a successful 12-month immersion cooling field trial. Rogers Corporation is validating microchannel cooler technology with multiple data center customers. AIT's technology vertical is contributing 300+ bps to growth from liquid cooling fluid management. The cooling bottleneck will emerge as the next constraint after power. Water infrastructure is becoming intertwined with data center thermal management. XYL and FELE see data center water cooling as a demand driver. AirJoule (AIRJ) has hyperscaler evaluations for its waste-heat-to-water technology. CECO's industrial water pipeline approaches $1B. CRH acquired Axius Water for $700M. The convergence of cooling, water, and power creates a new 'thermal management' investment category that cuts across traditional industrial classifications.