People have always sought after creature comfort from heating their cave to storing food intended for later consumption and lots of of their finds for the home started as processes for business or industry. In 1851, Dr. John Gorrie used compressed ammonia to assemble what his patent application called an icemaker. It was used to cool the patients' accommodation and in spite of his dreams of whole-house air conditioning, he lacked the financial resources and his invention stayed in the planning stages.
It took almost fifty years before the first commercial application of air conditioning cooled space for industrial processing, thanks to the creation of Willis Carrier. Stuart Cramer, operating a fabric mill in South Carolina discovered a method to add moisture to the air, making fabrics less difficult to work with while cooling the surroundings, and used the phrase air conditioning in his submission for the patent.
The initial methods of air conditioning used compressed gases such as ammonia, methyl chloride and propane, but the risk they presented led to the use of chlorofluorocarbon and in 1928 under the trade name of Freon, was discovered to be safe for man and machine. However, it was found harmful to the atmosphere and was replaced by hydrofluorocarbons, which proved safer, however even newer gases that are ozone friendly is taking their place and by 2010, all new products will contain Puron.
During the 1950's air conditioning use extended into home and cars, improving individual space and helped in the development of bigger, deep-well buildings. Designing central air conditioning systems that despatched cooled air through ductwork enabled wider building construction. Previously, the buildings had to be thin enough to let for proper air circulation right through the whole building.
It has also been noted, and disputed, that human efficiency improves in places where cooler temperatures are maintained. Research have professed that the most productivity occurs within a room temperature of 72-degrees, and reduces one percent for every two-degree temperature rise. Many say this is a effect of an air conditioning salesman's pitch and disagree with the hypothesis. While other are certain the study carried out in the Hawthorne Works, a manufacturing facility in the early 1930's, indicates the relationship between environmental temperature and productivity.
From the days of using towers of water and windmills to speed evaporation, controlling the interior surroundings has found it way into the air conditioning processes available today. From cooling small rooms to entire structures, people have discovered another technique to enhance their creature comfort.
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