We cannot deny the importance of heating and cooling system in our lives, and people who are living in the countries made on deserts and other countries where temperature is always near to 50 Celsius can understand it even better. There are many air conditioning companies working in these days, with the different kind of air conditioners, different models and with different technologies. There are air conditioners with climate control technology. This technology filters the cool air and makes you feel much soothe and brighter. It is always recommended by the doctors to drink more water especially for the people working or living in hot environment. There were many people who had lost their lives due to the dehydration in past. Air-conditioning has contributed a larger part to cut down the death ratio as in these days many buildings are air conditioned.
The heating and cooling system history also indicates that humans were bothered by the harsh rays of the sun. The brutality of the heat made them think about the heating and cooling system. This almost started in second century from Asia when Chinese inventors were thinking to cool down the temperature for the imperial palace. It took long time for investors to understand the mechanism for heating and cooling system; they discover many models with different names. In 1820 the British scientists discovered that by compressing and liquefying, the ammonia can chill the air. The effort to invent a machine that can control the room temperature was on the high priority in the world as there were many people working on this. In 1830's an American physicians in Florida invented a machine during his practice. The intension to invent this machine was to cool down the hospital rooms for the patients suffering from malaria and yellow fever. This was the first attempt to manufacture an air conditioner.
In 1902 Willis Haviland Carrier invented the first electrical air conditioner he named the machine as "Apparatus for treating air" this machine became more famous in less time and was installed in hospitals and pharmaceutical companies. The machine was famous but there were some disadvantages such as ammonia was used as coolant, the size was very large and it was very expensive. In 1922 Carrier made some changes to the machine by replacing the ammonia with benign and with addition of the central compressor he reduced the size and made it more efficient. Carrier introduced this air-conditioner to the movie theaters in New York City. This has opened the new door to the air-conditioning world.
There was a great advancement in air-conditioning after the Second World War, the most famous window units appeared. They become very famous in the beginning and their demand was the same for few decades. There were many air conditioning companies which started to manufacture these window units due to the high demand. Many of these companies also introduced different types of air-conditioning. In 1970's the split units were introduced by different companies, there were also some more technologies that were introduced such as ducted heating and cooling system. The air conditioning companies are still making the great enhancements by changing the size with same efficiency and bringing more healthcare technologies into air conditioning.
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