If the capacity of the machine is too small compared to the room, the machine will have to operate continuously, causing overload , affecting its lifespan and consuming more power. On the contrary, installing an air conditioner with too large capacity also causes problems. power waste and higher machine costs .
On the contrary, the installation of air conditioners with too large capacity also causes waste of electricity and costs to buy higher machines .
Here are a few quick suggestions for air conditioning capacity | suitable air conditioner based on the area and volume of the room
To better understand how to calculate air conditioning capacity | Air conditioners are based on area, room volume and a few other factors, please continue to refer to the article!
1. Calculation of air conditioner capacity | air-conditioner
Formula for calculating capacity of air conditioner | Air conditioners are mainly based on the area or volume of the space to be cooled. Accordingly, we have the following calculations:
- Calculate the capacity of the air conditioner | Air conditioner according to room size
This formula can be applied to normal rooms with an average ceiling of 3m or less (the average height of rooms in Vietnam).
Capacity needed for the room = Room area * 600 BTU (equivalent to 600 BTU/m2)
BTU is the British thermal unit, used to measure the capacity of heating or cooling equipment. 9,000 BTU = 1 HP (1 horse) .
For example: A room with an area of 15 m2 you will calculate: 15 m2 x 600 BTU = 9,000 BTU, equivalent to an air conditioner | 1 HP capacity air conditioner .
- Calculate the capacity of the air conditioner | air conditioner by room volume
The advantage of the volume method is that it will provide more accuracy than the area calculation . This calculation should be applied to cases of houses with high ceilings, attic rooms from the top down...
Capacity needed for the room = Room volume * 200 BTU (equivalent to 200 BTU/m3)
Room volume = room area x height
For example: Room with a volume of 50 m3 you will calculate: 50 m3 x 200 BTU = 10,000 BTU => should choose air conditioner | 1.5 HP capacity air conditioner to cool enough.
- Calculate power according to external conditions
The above calculation methods have omitted external factors to simplify, provide an acceptable, relative accuracy. However, if there are specific parameters, you can also calculate the detailed capacity of the air conditioner according to external conditions according to the formula below:
Cooling capacity of air conditioner | Air conditioners can be affected by many other factors such as:
Building materials.
Direct heat source.
Number of people in the room.
The room has many electronic devices.
The window in the room…
In short, depending on the actual conditions, it is possible to decide that the machine has a larger capacity . In case, while using a room with an outside surface exposed to direct sunlight, connected to another room, often with a large number of people,... you should add 0.5 HP (~4500 BTU) to the capacity of the machine you intend to buy, In order to reduce the loss of hot heat, additional cooling capacity will be lost.
2. Some suggestions for installing air conditioners in different room spaces
3. Air conditioner | Air conditioner for family room
Air Conditioner | Household air conditioners usually have a small capacity , because it does not need to cool too much. However, if the room space where you put the air conditioner | If the air conditioner is in the living room or kitchen, it should add 0.5 HP. Because that place usually contains many people and has a relatively large amount of heat.
4. Air conditioner | Air conditioners for cafes and restaurants
If you choose an air conditioner for a cafe or restaurant, due to the crowded nature and often open the door, you need to choose the type of air conditioner | The air conditioner has a relatively large capacity .
5. Air conditioner | hotel air conditioner
Most hotels often rent out rooms for a short time, so from entering the room, users often want the room to have a faster cooling speed .
6. Air conditioner | Air conditioner for office
Most offices usually have a stable number of people working and often sitting for a long time. Therefore, we can calculate the harmonic power | air-conditioner like the one used for family living room.
Summer is the time when air conditioners take the throne. If you are planning to buy an air conditioner for your room, please refer to the tips to choose the right air conditioner for the room area below.
7. How to calculate air conditioner capacity?
The formula for calculating the capacity of the air conditioner is mainly based on the area and volume of the space to be cooled. We can apply the formula: 1m 2 x 600 BTU. In which, BTU is the British thermal unit, used to measure the capacity of heating or cooling equipment.
For example : a room with an area of 15m 2 you will calculate: 15m 2 x 600 BTU = 9,000 BTU equivalent to an air conditioner with a capacity of 1 HP (1 HP = 1 horse equivalent to 9,000 BTU).
Below is a table to choose the capacity of the air conditioner according to the needs of use and the maximum volume of the room for your reference:
| Wattage | Family | Cafe/restaurant | Hotel | Office |
| 1HP | 45 m 3 | 30 m 3 | 35 m 3 | 45 m 3 |
| 1,5HP | 60 m 3 | 40 m 3 | 55 m 3 | 60 m 3 |
| 2HP | 80 m 3 | 60 m 3 | 70 m 3 | 80 m 3 |
| 2,5HP | 120 m 3 | 80 m 3 | 100 m 3 | 120 m 3 |
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