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.
Elie Aghnides
Elie Prodromou Aghnides (1901–1988) was a Greek engineer and inventor, most famous for his invention of the faucet aerator. He was born in Istanbul, Turkey, in 1901. He had three siblings: Nicholas Prodromou Aghnides (1883-1979), a former professor at Columbia University; Thanassis Prodromou Aghnides (1889-1984), a former Greek ambassador and undersecretary to the United Nations in London during World War II; and Esmeralda Aghnides (1895-1992). Aghnides was educated in England and received an engineering degree from the University of Belgium.