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The Invention that Changed the World
Since 1902, Carrier has cultivated a history of proven innovation in the heating, air-conditioning and refrigeration industries, enabling global comfort and efficiency.
Reinventing History
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![1915-willis-carrier-inventor-modern-air-conditioning-silhouette-sm](https://images.carriercms.com/image/upload/h_200,c_fit,q_auto,f_auto/v1562861804/carrier/commercial-hvac/people/1915-willis-carrier-inventor-modern-air-conditioning-silhouette-sm.jpg)
Before the invention of modern air conditioning, hot, steamy weather often meant lost work days and sleepless nights. On July 17, 1902, Willis Haviland Carrier designed the first modern air-conditioning system, launching an industry that would fundamentally improve the way we live, work and play.
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In 1911, Willis Carrier's Rational Psychrometric Formulae brought science to what had been the often hit-or-miss design of air-conditioning systems, and in the process made Carrier an international name. The chart would be updated and reprinted regularly, serving as an essential tool to generations of engineers.
![father-son-looking-at-chiller-in-building-sm](https://images.carriercms.com/image/upload/h_200,c_fit,q_auto,f_auto/v1562862264/carrier/commercial-hvac/people/father-son-looking-at-chiller-in-building-sm.jpg)
In 1922, the first centrifugal chiller opened the door to large-scale comfort air conditioning. The innovation famous for introducing the general public to air conditioning became, during World War II, a critical component in the efficient production of war material.
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