In 1903, a particularly large number of visitors were observed in the Cologne in the theater. People sought to get there not only for the performance, but also in order to enjoy the unusual coolness that reigned in the hall in hot summer weather; and at the same time and admire the device that created this coolness in the hall. This was one of the very first air conditioners in the world. If you want to order diamond drilling, drilling holes in the concrete of St. Petersburg, we advise you to follow the link given.
This device was invented just a year before. American Willis Carrier developed it for one of the New York printing houses, but then he did not cool the air, but drained: increased humidity reduced the quality of printed products.
In the first decades of the twentieth century, cumbersome air conditioners received a certain distribution, which were intended for large rooms. They were expensive, very noisy and did not fit for ordinary apartments. In 1924, real crowds were observed in one of the large stores of Detroit. People did not come for shopping, but just to look at the outlandish device that cools and refreshing air in the spacious hall of the department store. Despite the fact that the air conditioner occupied a decent area, its functions did not differ in diversity.