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The following article was published in our article directory on May 9, 2012.
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History of AC UNIT 1902-2012

Article Category: Home Management

Author Name: Yilitza Acosta

The genesis of the modern ac unit occurred in 1902 when Willis Carrier created a machine to reduce humidity in a publishing company located in Brooklyn New York. His system to absorb humidity from interior air used fans blowing across a series of cold pipes. Moisture collected on the pipes and was drained off eliminating much of the humidity in the building. This giant humidifier also produced lower internal temperatures in the publishing company, making it a more comfortable place to work. Carrier had created an ac unit without knowing it. In years to come, everyone would know it. As a matter of fact, his name is still associated with many of today's modern air conditioners used in homes throughout America.

A modern ac unit for your home comes in three basic configurations. Central air, split system units and the most common, the window air conditioner, all provide a degree of comfort on hot days. If you live in the Southern States you understand this ac unit appliance is almost a necessity in summer months.

No matter which ac unit you choose, they all operate on the same principal. The internal components consist of a coil that collects the heat, a compressor that changes the liquid refrigerant into gas, another coil that cools and an expansion valve that runs between the hot and cold coils. Fans expel hot air through the hot air coils while a second fan blows the cold air into the room. Basically an ac unit works like this.

When the liquid refrigerant flowing through the system is changed to gas interior heat is absorbed and expelled by a fan in the unit. Using the same refrigerant compressed and turned into liquid causes cooling in another set of coils. The fan blowing across these coils pumps cold air into the home. This is the basic function of your ac unit.

A central ac unit uses a series of fans and ducts inside your home to move cool air throughout the house. As can be expected, whole home cooling uses a larger appliance to achieve comfort levels. These units are usually placed outside the home but in proximity to the heating system making it easier to connect to the series of internal ducts that will carry the cool air throughout the home.

A more recent invention is the split-level ac unit generally used in larger applications. The word split refers to splitting the hot side of the system from the cold side. They become two separate units. The cold coil and expansion valve on the cold side of the split is usually located in a furnace. Again fans blow the cold air through the duct system to cool your home. The hot side condensing unit and coil is located outside. A split-level ac unit is much the same as a window air conditioner. The cooling part is located inside while the hot coils and compressor are outside.

Ac unit manufacturers have been encouraged by the Federal Government to provide more energy efficient air conditioning units with a higher SEAR, (Seasonal Energy Efficiency Ratio) number. This initiative has been introduced to help lower dependant energy costs and at the same time coincide with environmental efforts to keep our planet green.

Keywords: Air Conditioning, Air Conditioning Installation, Carrier, Central Heat and Air, HVAC Systems, Heating and Air Conditioning

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