Air conditioning
In 1902, the first modern electrical air conditioning unit was invented by Willis Carrier in Buffalo, New York. After graduating from Cornell University, Carrier found a job at the Buffalo Forge Company. There, he began experimenting with air conditioning as a way to solve an application problem for the Sackett-Wilhelms Lithographing and Publishing Company in Brooklyn, New York. The first air conditioner, designed and built in Buffalo by Carrier, began working on 17 July 1902.
August Luebs
August A. Luebs (February 28, 1889 – September 8, 1989) was an American mechanical engineer and an expert on air conditioning and heating. He pioneered the science of air conditioning in the early part of the twentieth century.