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Author:
Marcus Peterson

In ordinary conversation, when the term air conditioning is mentioned, people automatically take it to mean cooling room temperature. Technically speaking, though, air conditioning is the process of controlling room temperature through various means that involve ventilation, heating and cooling. In construction, it is referred to as HVAC.

In 1902, The New York Stock Exchange was the very first building to use air conditioning units that separately cooled and heated the air. Later that year, Willis Havilland Carrier installed the very first electrically-run air conditioning unit at a printing plant. The unit not only cooled the air but also controlled the humidity.

In those times, air conditioning was mostly used in manufacturing facilities to improve products by controlling the effects of humidity, thus, increasing employee productivity. It was several decades later, in the 1950s, that homes and automobiles started to be fitted with the air conditioning technology.

An air conditioning unit cools the air through a refrigerant, a substance that alters the temperature of the air. In the early stages of its development, air conditioning units used harmful gases such as ammonia and methyl chloride as refrigerants. They were soon replaced by another type of chemical, the patented substance called Freon.

Freon is safe for humans. However, it is harmful to the environment. When released into the atmosphere, this chlorofluorocarbon gas is believed to be a contributing factor to the thinning of the ozone layer. Most air conditioning units sold today still use this type of gas, particularly the HCFC R-22. It is said that environmentalists will have to wait until 2010 to see the total eradication of HCFC R-22 in air conditioning untis.

Air conditioning units have different types of refrigeration cycles. The first type uses a heat pump that drives out hot air from the room and blows in cooled air though a compressor. The second type pumps in a refrigerant. When the refrigerant evaporates, it takes with it the hot air and leaves cooled air.

Air Conditioning provides detailed information on Air Conditioning, Air Conditioning Repairs, Central Air Conditioning, Auto Air Conditioning and more. Air Conditioning is affiliated with Chiller Rentals.

A Quick Note From The Publisher... If you like the article above, you may be interested in the following article which is also related to HVAC... Air Duct Cleaning Can Help You Breathe Easier Cleaning the air ducts in your home can help to eliminate dust, strange odors and improve your breathing. If the inside of your home seems slightly dingy and dusty no matter how often you clean, if you notice a strange odor in your home, and if your family members suffer from chronic respiratory difficulties, it could be time to get the air ducts cleaned. Your heating, ventilation, and air conditioning system, sometimes referred to as "HVAC," can collect a variety of harmful contaminants like mold, fungi, bacteria, and small particles of dust. These contaminants fill the air in your home, (not to mention the window sills), and can affect your health-in particular your breathing. According to the Environmental Protection Agency (EPA), removing these contaminants from your home can improve indoor air quality. Not only will your air quality be improved, but your HVAC system will function more efficiently, costing you less money in heating and cooling bills. Cleaning the air ducts in your home is not a task you can perform yourself. A company will come into your home and use a special vacuum to suction dirt out of the ducts. They may also employ special equipment to dislodge any items that may be stuck in the ducts. You will probably also have the option of having a sanitizer applied to the ducts. This is an anti-microbial chemical that will reduce the growth of bacteria and fungus. This sanitizer should be applied only after the system is cleaned, and should be certified by the EPA for use in HVAC systems. Be sure to ask about EPA certification prior to hiring the duct cleaning company. A good source for information on air duct cleaning is the National Air Duct Cleaners Association (NADCA) at www.nadca.com. This association certifies air duct cleaners and provides...