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History of ventilation: Air conditioning units become common in the USA!
News
June 14, 2016

History of ventilation: Air conditioning units become common in the USA!

In 1920s after the tremendous breakthrough for electricity at the beginning of the 1900s, electrically-powered equipment began to be installed on a grand scale, especially in the USA where it became commonplace in industrial plants, hotels, theatres and cinemas. It is said that a contributing factor to the rise of the American film industry was the fact that cinemas could offer a few hours of relaxation in a pleasantly cool venue.