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Willis Carrier has the brilliant idea to invent the ac not to cool homes but to control humidity in a printing plant that he worked at.
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The first air conditioner is used in St. Louis for the fair.
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Stuart Cramer invents the term Air Conditioning.
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The ac is innovated to be used in house.
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The Ac has over one million units sold to use in house.
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Now every 1 in 5 houses have an air conditioners
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Central air is now becoming much more popular as the popularity and the sales for window units decrease little by little.