In the 1700s, Benjamin Franklin and John Hadley officially discovered that the evaporation of any liquid has a cooling effect.
In 1902, Willis Carrier invented the first modern air conditioner in Buffalo, NY. His “Apparatus for Treating Air” was created specifically for a lithograph and publishing company. When other companies grew interested, he established the Carrier Air Conditioning Company of America.
In 1925, on Memorial Day Weekend, Carrier’s new air conditioner (with a central compressor) debuted to the public at the Rivoli Theater in Times Square. As a result, people crowded the theatre on hot summer days, creating the first “summer blockbuster.”
In the 1930s, air conditioning spread to offices, improving workers’ summer productivity.
In the 1960s, only 10% of U.S. homes had air conditioning units.
In the mid-2000s, approximately 86% of U.S. homes had air conditioning units.
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