Johnson Controls makes and installs building technology systems — commercial HVAC, building controls and automation, fire detection and suppression, and security systems — for commercial, industrial, and institutional customers. Core products include the YORK chiller brand for commercial cooling, the Metasys building management platform, and fire and security systems sold under the Simplex, Grinnell, Ansul, and other brands. Customers span data centers, hospitals, universities, pharmaceutical and advanced manufacturing facilities, and large commercial offices. Johnson Controls sells primarily through a direct channel of roughly 40,000 field employees globally. Following the sale of its residential and light commercial HVAC business to Bosch in 2025, Johnson Controls reorganized into three geographic segments: Americas (the largest, with particular strength in data centers and applied HVAC), EMEA, and APAC. The company earns revenue two ways: selling and installing systems (projects) and servicing the installed base over time. Service revenue — maintenance, repair, and remote monitoring under long-term contracts — represents roughly 32% of sales and carries higher margins than systems. A key feature of the model is the lifecycle flywheel: each system sold creates an installed base that generates recurring service revenue. Management is targeting higher service attachment rates, benchmarking against industries like elevators. The primary growth drivers are data centers (currently ~10% of sales and growing above company average), decarbonization and heat pumps in Europe, and mission-critical environments like biopharma and semiconductor fabs. CEO Joakim Weidemanis is deploying a lean operating system to improve margins and working capital efficiency.