Air conditioning is the cooling of indoor air for thermal comfort. In a broader sense, the term can refer to any form of cooling, heating, ventilation, or disinfection that modifies the condition of air. An air conditioner (often referred to as AC or air con.) is an appliance, system, or machine designed to stabilise the air temperature and humidity within an area (used for cooling as well as heating depending on the air properties at a given time), typically using a refrigeration cycle but sometimes using evaporation, commonly for comfort cooling in buildings and motor vehicles.

The concept of air conditioning is known to have been applied in Ancient Rome, where aqueduct water was circulated through the walls of certain houses to cool them. Similar techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season. Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by Willis Haviland Carrier.

From Wikipedia under the GNU Free Documentation License
Sat Jul 31 12:41:52 2010

YMCA Fishing Challenge Air
iernaair.com
YMCA Fishing Challenge Air
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Manual Air Conditioning JPG
patrickellul.com
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Link

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myhvacparts.com
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Tif Leak Detector Educational Page on freon leaks here Finding Freon Leaks Click image to enlarge use browser back button to return Directly below is a shot of a bottle of the special leak detection solution used to find freon leaks Brand may be substituted

From Yahoo Image Search: "Air conditioning"
Fri Jul 30 16:50:20 2010

Mobile Air Conditioning - Cooler and Cleaner Rooms
prlog.org
Mobile Air Conditioning - Cooler and Cleaner Rooms

unknown

Mon, 26 Jul 2010 15:20:54 GM

Mobile . Air Conditioning. - Cooler and Cleaner Rooms. Mobile . air conditioning. units not only bring down the summer heat but can also dramatically improve air quality stopping pollen and other allergens.

From Google Blog Search: "Air conditioning"
Sat Jul 31 08:19:58 2010

Researchers study green air conditioning - Diamondback Online
diamondbackonline.com
Researchers study green air conditioning - Diamondback Online
Thu, 29 Jul 2010 03:44:42 GMT+00:00
Diamondback Online ... from the US Department of Energy to study a type of metal that could boost energy- and space-efficiency in refrigerators and air conditioning units. ...
Board leans toward air conditioning for Portsmouth Middle School in letter to JBC - Foster's Daily Democrat
fosters.com
Board leans toward air conditioning for Portsmouth Middle School in letter to JBC - Foster's Daily Democrat
Wed, 28 Jul 2010 07:23:12 GMT+00:00
for Portsmouth Middle School in letter to JBC Foster's Daily Democrat portsmouth in an effort to inform the city of the need for air conditioning in the middle school, the School Board will present a letter to ... School air conditioning a hot topic in Portsmouth tonight Foster's Daily Democrat Plea made to cool new Portsmouth Middle School Seacoastonline.com
Power Partners and PNNL Work on Commercial Air Conditioning - EP Magazine
eponline.com
Power Partners and PNNL Work on Commercial Air Conditioning - EP Magazine
Wed, 28 Jul 2010 07:40:11 GMT+00:00
EP Magazine The adsorption chiller is a type of air conditioner that is powered by waste heat or by heat from solar collectors. It has few moving parts and uses almost ...

From Google News Search: "Air conditioning"
Thu Jul 29 06:34:10 2010

How often do air conditioning units need to be charged with freon?
Q. We have been having terrible problems with our central air conditioning unit. Our house is about 8 years old and we have a zone system (separate heating and cooling thermostats for upstairs and downstairs). For the past 2 years the unit is not cooling the house properly (heating works fine). We had the dampers replaced 2 years ago and I know the dampers are fine. We have had several repair technicians look at the unit. They always recharge the unit with more Freon (3 times in 1 summer) after claiming to fix a leak. This past weekend again a repair person claimed that we had an internal leak in the unit. He said that he had plugged the leak and then he charged the unit with Freon. Not only did this not work (our house continued to get… [cont.]
Asked by mshah68 - Mon Jun 25 16:38:07 2007 - - 5 Answers - 0 Comments

A. A system only needs to be charged once, when it is installed. If it gets a leak, the leak must be repaired, and verified that it is repaired with a vacuum test. It is a laborious process, and some homeowners would rather just juice up the machine each year than spend the funds to get it repaired. Some units have leaks that can never be identified. There are lots of fittings, small bends in the coils, and hundreds of feet of tubing that need to be traced with an accurate tool. Many Tech's don't have access to this tool, and rely on soap bubbles to identify leaks. Contact the manufacturer of your unit, and have them recommend a competent company in your area. If it is the company that you've been using, explain that they have not fixed… [cont.]
Answered by OrakTheBold - Mon Jun 25 20:32:27 2007

Do you have to keep the air-conditioning fan running in order to turn the power humidifier on?
Q. I have a Lennox power humidifier model WP2-18. I have noticed that whenever I turn off the air-conditioning fan, the humidifier doesnot work. How are these two things tied together? Do I have to keep the fan running for the humidifier to be operational.
Asked by catchvim - Sun May 4 17:02:21 2008 - - 2 Answers - 0 Comments

A. The humidifier only receives power when the fan is running.
Answered by RICH @www.hvac-for-beginners.com - Sun May 4 17:26:58 2008

What is the best, inexpensive way to add Air Conditioning to my 1993 Chevy G10 Van?
Q. My 1993 Chevy G10 Van has no air and I use it for work. What is the best way to add air conditioning? Ideally I would like a portable cigarette lighter powered one that I can also use in my car, but I haven't found one that is powerful enough or doesn't require a 'cooler evaporator'. RV units usually take too much juice. What aftermarket units are available and how can I get by inexpensively?
Asked by Robert - Thu Feb 11 00:08:20 2010 - - 2 Answers - 0 Comments

A. look for another van with AC it'll be a lot easier
Answered by Bear - Thu Feb 11 01:48:12 2010

From Yahoo Answer Search: "Air conditioning"
Fri Jul 30 21:59:37 2010

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Fri Jun 25 11:41:51 2010