Carrier's data center cooling orders were up 400% in Q4. A 1GW data center requires ~500 chillers compared to 3 for a standard office building. AI infrastructure requires massive physical cooling. While residential HVAC is cyclical and currently down, the secular boom in data centers provides a high-growth offset that the market is underpricing. Long Carrier as a "pick and shovel" play on AI data center build-outs. Continued high interest rates stalling the recovery of the residential housing side of the business.