I. Local air conditioning:

1. Basic information:

Local air conditioner is a split type air conditioner including 01 outdoor unit, 01 indoor unit and connection system (electrical wire, gas pipeline, sewage pipe system...).

Belongs to the civil line with beautiful design, often used in households, shops, and small offices.

2. Classification:

- According to the structure of the air conditioner unit divided into 3 main types:

• Wall-mounted air conditioner: The capacity range of wall-mounted air conditioners separates from 9,000 BTU – 24,000 BTU

• Standing air conditioner: basically the same structure as the wall-mounted air conditioner, but the large indoor unit is placed on the floor and the capacity ranges from 18,000 BTU - 55,000 BTU with larger space.

• Cassette air conditioner with 1 indoor unit: similar in structure to wall-mounted air conditioners with 1 outdoor unit and 1 indoor unit. The indoor unit is suspended from the ceiling and is equipped with a centrifugal fan that continuously creates a circulation, helping to distribute the air evenly throughout the room. Local cassette ceiling air conditioner capacity range 13,000 BTU - 48,000 BTU.

In addition, with wall-mounted air conditioners, you can choose from additional features such as:

• Air conditioner Inverter helps control the capacity of the device to avoid wasting energy.
• Non-Inverter Air Conditioner.

• 1-way wall-mounted air conditioner is suitable for areas with hot and humid climate all year round, with only 1 cooling function.

• 2-way wall-mounted air conditioners have the ability to both cool and reverse for heating.

3. Advantages and Disadvantages:

- Advantage:

• The price is cheap because the local air-conditioning system only includes 1 outdoor unit and 1 indoor unit
• Suitable for many interior spaces thanks to its diverse, elegant and eye-catching designs
• Easy installation: The installation of wall-mounted air conditioners is quite simple, easier than other air conditioners.

- Disadvantages:

• Limited machine capacity with large spaces will not ensure uniform cooling.
• Limited cooling capacity: on hot days, it can lead to overload, poor cooling of the air conditioner and only focus on cooling the surrounding areas near the machine location.
• The aesthetic is not high: because the cooling capacity is limited and localized in each area as well as a certain area. So in order to optimize the cooling capacity if using local air conditioners, we have to use more machines at the same time, leading to the arrangement of outdoor units also increasing, occupying area, affecting space and aesthetics. general view.

II. Air Conditioner Multi:

1. Basic information:

As an improvement of conventional air conditioners, this is a line of air conditioners that combine central air conditioners and wall-mounted air conditioners. Multi air conditioners include 1 outdoor unit that provides cooling for 2-5 indoor units at the same time.

The operation mechanism of the Multi air conditioner is quite similar to the wall-mounted air conditioner, the outdoor unit will supply liquid gas to the indoor unit, the liquid gas will evaporate and collect heat from the air passing through the indoor unit, the air will lose heat so the down to cool the room.

Multi air conditioner will be the right solution for apartments, townhouses, with many rooms but limited balcony area.

2. Advantages and Disadvantages:

- Advantage:

• Save space, ensure aesthetics
• Save energy and increase cooling efficiency
• Independent operation and control quiet operation
• High flexibility: capable of connecting a variety of indoor units such as wall-mounted, ceiling-mounted, cassetle ceiling air conditioners or ducted ceiling air conditioners.

- Disadvantage:

• Initial investment costs are quite high.
• Disadvantage in terms of repair and maintenance because only 1 outdoor unit is used for many indoor units, so during use, if the outdoor unit has problems, the indoor units in the rooms must temporarily stop working.

III. VRV/VRF central air conditioner:

1. Basic information:

Is a type of large capacity and very large air conditioning system designed to cool and control the humidity of a building or a large area through a duct system.

Central air conditioners are used in office buildings, commercial centers, hotels, hospitals, high-class villas and places with large areas that need air conditioning.

2. Classification:

- VRV/VRF central air conditioning system is an air conditioning system that can adjust the refrigerant flow through which the capacity can be changed according to the external load.

In addition, similar to the central air conditioning system VRV/VRF, but in the system used in large industrial or commercial applications, it is also possible to mention the Chiller central air conditioning system which is a system consisting of one or more central machines. combined into a whole system. This system uses water as a cooling agent through piping systems that bring water into heat exchangers to cool the cooling air for the entire area.

3. Advantages and Disadvantages:

- Advantage:

• Energy saving system operated with inverter technology compressors.
• The capacity of the outdoor unit is assembled with the module, so it is easy to change the size according to the design requirements.
• The difference and the allowable gas pipe length is much longer than the local system.
• Indoor units with a small and diverse capacity range make it easy to design and choose the cooling space and control independently.
• The intelligent control system can be connected to the building BMS system.
• Many intelligent functions and utilities for accurate fault detection testing.

- Disadvantages:

• There is a possibility of a gas leak in the building if the piping is welded or inspected improperly.
• Small capacity indoor units should not optimize the dehumidification, humidification, etc.

IV. Summary table distinguishing types of air conditioners:

In the table below, JDesign has summarized the basic criteria for popular air conditioners today. These brief information will help you have the most overview and easily choose the right one for your needs:

V. Prestigious and popular air conditioner brands:

1. Daikin:

2. Mitsubishi:

- Mitsubishi Heavy Industries:

- Mitsubishi Electric:

3. Panasonic:

In addition, there are a number of other reputable brands that are distributed and popularized such as: LG, Samsung, Sharp, Casper, etc.

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