Johnson Controls International is an American Irish-domiciled multinational conglomerate headquartered in Cork, Ireland, that produces fire, HVAC, and security equipment for buildings. As of mid-2019, it employed 105,000 people in around 2,000 locations across six continents.

Johnson and a group of Milwaukee investors led by William Plankinton incorporated the Johnson Electric Service Company in 1885 to manufacture, install and service automatic temperature regulation systems for buildings.

The company's operations are segmented into two business units: Building Efficiency and Global WorkPlace Solutions.

The Building Technologies and Solutions business unit designs, produces, installs and services heating, ventilation and air conditioning systems, industrial refrigeration, building management systems, fire and security systems and mechanical equipment for commercial and residential buildings.

The brands produced under this business unit are York, TempMaster, Metasys, Panoptix, Frick and Sabroe. This unit also works with organizations to reduce the energy consumption and operating costs of their buildings. This includes retrofitting existing buildings such as the Empire State Building and working on maximizing efficiency in new construction such as the Burj Khalifa in Dubai. Building Technologies & Solutions is the company's longest-running business unit, dating to 1885 when Johnson founded the Johnson Electric Service Company after patenting the electric thermostat in 1883. As of 2012, the business unit operated from 700 branch offices in more than 150 countries.

According to Wikipedia