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In the year 1902, Willis Carrier was waiting for a train on a platform in Pittsburgh. As he tried to peer through the foggy morning air, realisation struck him. He realised that he could pass dry air through water to create fog. By doing so, he was able to create air with specific amounts of moisture in it.
In this artist's conceptualization, Willis Carrier starts the engine that will drive the world's first modern air-conditioning system, installed in the summer of 1902 at the Sackett & Wilhelms printing plant in Brooklyn, New York.
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, New York by Carrier, began working on 17 July 1902