Central air conditioning units are generally considered a closed loop. Easy water utilization or so-called Chiller or water coolers, which are the cooling broker in that case, and then the pumps send those cold water to air handling units within the building. Which consists of the coil and blower so that the cold water passes inside the coil and the blower forces the air to pass through it and thus the air loses its heat and is absorbed by the cooling medium and here comes the role of the duct air distribution ducts where the cold air passes in that sewers reaches the diffuser, which is considered as the opening responsible for sending air to the place to be cooled. As I mentioned before, the cooling cycle is closed, so the cold water whose temperature has increased is returned again through pumps that receive water from the handling units and send it to the chillers again for re-cooling. And send it again.

1. Water Chillers
2. Air handling unit
3. Duct System (Sewage distribution)
4. Air Blower & Diffuser  (Fans and air dispensers)

To select these ingredients with quality and size, the reimbursable pregnancy accounts must be done for the establishment, whether residential – commercial – industrial and other

When choosing these devices and regulations, some basic requirements, including:

1.The thermal load of the building

2.Building requirements (hotel, hospital, commercial complex)

3.Architectural design for the building as well as places available for the establishment of major devices and assistance

4.Cost of the system (basic cost of the system and operating cost).

1. Central air conditioning gives coolness for a larger space of normal Split adaptations and less consumption of electricity if several  Split air conditioners are used
2. Central air conditioning is easy to maintain because the components of the central unit are far from the place to be installed
3. Central air conditioning is less noise because the central unit is far outside the building
4. It facilitates the distribution of fresh air in all corners of the building evenly as it uses (ducts)
5. There is no water fall no drainage from the central unit and no electricity cables block the building

Chiller Air conditioner:

It is called the chiller because it conveys the cooled water to the house by means of air circulation fans and distributes it in the place and pumps fresh air and removes dirt and dust. The cooled air conditioner draws the indoor air to the rooms and gives them cool and fresh air, its cost is very high, it is installed in homes, hospitals, and malls, because it is large places that need central air conditioning, and the Chiller air conditioner is the most suitable.

Package air conditioner :

Its function is to draw air and cool it and mix with the outer air,and it needs many handling to pass air ducts to the house, suitable for all large or small homes, its installation is inexpensive, and the demand for it increases due to its cost as it is central air conditioner and fits all places

Central Split Air Conditioner:

Its price is reasonable and it contains many systems that can be connected to anywhere in the house to rooms or halls, the central Split air conditioner does not renew the air, and its maintenance costs are suitable for everyone, and it can be installed in a place of up to 900 meters, it is the most affordable air conditioner and its price is suitable, and it gives all parts of the house a cooling rate big.

Central Air conditioner cooling systems Separate Cooling Units:

Separate cooling units: They are large split units, and the air handling unit is placed in the place, called the hidden units. They reach 4 tons of refrigeration, and the pipes used in them are made of copper, and there is a large amount of Freon in it.

Groups: is a large window installed with ducts, and placed outside the house.

Chiller Air Conditioner: It is placed at  home, covered and has filter systems for filtration.

These systems are used in many applications such as: hotels, commercial complexes, hospitals, offices, theaters and others, classification of air conditioning systems are usually classified according to the types of heat carrier from devices to the place to be adapted:

1. Air and water system
2. All water system
3. All Air system