, Aqueduct water was used through walls of houses in ancient roman times as an attempt to cool down houses. Medieval Persia used wind towers and cisterns to try cool buildings. Willis Haviland Carrier created the first large-scale air conditioner that was run by the use of electricity. This break through was in 1902. However, the experiments into cooling down indoor air started before Willis’s invention in 1902. Benjamin Franklin and a professor in chemistry john Hadley in 1758 explored the world of evaporation. From their experiments with liquids such as alcohol they were able to find that by using evaporation they could drive down the temperature past the freezing point of water. Michael Faraday who was an inventor and scientist during 1820. He found that by compressing and liquefying ammonia it could in fact cool the air when evaporation was placed on the liquid on ammonia. In 1842 ice was generated by using compressed technology by John Gorrie, which he used to cool the indoor air for his patients. The patent to invent and create the ice machine was given to Gorrie in 1851. However, Gorrie suffered financial problems ad died before he could realise his dream, which was to be able to cool town cities with air conditioners. It too another 50 years before Gorrie’s ideas were picked up again. Willis Haviland Carrier invented a machine that would control temperature as well as humidity. Air was sent through cold coils and thus cooled air and blew this air inside. The moisture in the air was then reduced and controlled in the cooler air. In 1906 Stuart Cramer created the term air conditioning. This was because he ‘conditioned’ moisture through ventilation. The result was that the moisture in factories was changed and the humidity was then controlled. Freon was introduced in 1928 by Thomas Midgley Jr and made the first air conditioners and refrigerators with Freon. During the boom of the 1950s air conditioners were apart of it to provide both home and vehicle comfort. Research is still continuous in air conditioners to make them more energy efficient and to continue to improve the quality of the air.