What is air conditioning and where he came from? Few people ask such questions. Meanwhile, for the first time in 1815, Frenchman Jean Shabannes received a British patent for a method of 'air-conditioning and temperature regulation dwellings and other buildings. " But only in 1902, an American engineer and inventor Willis Carrier gathered Industrial refrigerating machines for the printing plant in Brooklyn, New York. It is curious that the first air conditioner was not intended for a cool staff, and to deal with humidity, health was deteriorating print quality. But a year later the air conditioner in our understanding has appeared in a theater in Cologne, and in 1924 the air conditioning system was installed in one of department stores in Detroit. These early machines and became the ancestors of modern systems of central air conditioning. Already in those days there were water-cooling machines, chillers, indoor units, fan coil units, and something resembling a modern central air conditioners.
Over time, appeared more sophisticated compressors, as a coolant was used Freon, a fan coil units are similar to the indoor unit split systems. However, schematic diagram of the traditional central air conditioning systems has remained unchanged to this day. Ancestor of all modern air conditioners can be considered the first room, was released by General Electric in 1929. Because as a refrigerant in the device used ammonia, which the pair are not safe for human health, air conditioner compressor and condenser were made on the street. That is, in essence, this device was most of this split-system.