Willis Carrier was born on November 26, 1876, in Angola, New York, the son of Duane Williams Carrier (1836–1908) and Elizabeth R. Haviland (1845–1888). He studied at Cornell University, graduating in 1901 with a BSE degree.
In Buffalo, New York, on July 17, 1902, in response to a quality problem experienced at the Sackett-Wilhelms Lithographing & Publishing Company of Brooklyn, Willis Carrier submitted drawings for what became recognized as the world's first modern air conditioning system. The 1902 installation marked the birth of air conditioning because of the addition of humidity control, which led to the recognition by authorities in the field that A/C must perform four basic functions: control temperature, control humidity, control air circulation and ventilation, cleanse the air.
After several more years of refinement and field testing, on January 2, 1906, Carrier was granted U.S. Patent 808,897 for an Apparatus for Treating Air, the world's first spray-type air conditioning equipment. It was designed to humidify or dehumidify air, heating water for the first function and cooling it for the second.
In 1930, Carrier started Toyo Carrier and Samsung Applications in Japan and Korea . South Korea is now the largest producer for air conditioning in the world. The Carrier Corporation pioneered the design and manufacture of refrigeration machines to cool large spaces. By increasing industrial production in the summer months, air conditioning revolutionized American life. The introduction of residential air conditioning in the 1920s helped start the great migration to the Sunbelt. The company became a subsidiary of United Technologies Corporation in 1980. The Carrier Corporation remains a world leader in commercial and residential HVAC and refrigeration. In 2007, the Carrier Corporation had sales of more than $15 billion and employed some 45,000 people.
According to wikipedia
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