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The capacity of air conditioners or air conditioners is commonly expressed in BTU/h. The smallest capacity in Vietnam is 9,000 BTU/h (equivalent to 2,6375KW). Additionally, many people use horsepower (HP) as a unit to indicate air conditioner capacity, with one HP being equivalent to 9,000 BTU/h.
Understanding BTU or HP ratings makes the air conditioner selection process more effective and straightforward.
Calculating Air Conditioner Capacity for Appropriate Room Size
1. What are BTU and HP?
BTU, an abbreviation for British Thermal Unit, is an energy unit used in the United States to describe the energy value of fuels. It precisely indicates the capacity of heating and cooling systems and can be easily identified on air conditioners, heaters, ovens, and more.
HP, short for
2. Formula for Calculating Air Conditioner Capacity
Calculating the air conditioner capacity is quite straightforward with the formula:
Air Conditioner Capacity = 1 m2 x 600 BTU or
Air Conditioner Capacity = V x 200 BTU (V is the area where the air conditioner is installed)
3. Illustrative Examples
Example 1:
If your room has an area of 15 m2 (15 square meters) -> the cooling capacity will be: 15 m2 x 600 BTU = 9000 BTU.
Example 2:
You'll have 1HP = 1 horse = 9000 BTU , so if your room is 15 m2 -> the air conditioner capacity of 1 HP will be suitable.
According to this unit's usage, the current market air conditioner capacities are:
- 1 HP is equivalent to 9000 BTU
- 1.5 HP is equivalent to 12000 BTU
- 2 HP is equivalent to 18000 BTU
Example 3:
Another method to calculate air conditioner capacity for enclosed spaces is using the formula: 1 m3 (1 cubic meter) is equivalent to 200 BTU. Therefore, if you calculate the capacity for the air conditioner, you need to use the formula mentioned earlier, and a similar formula is: HP = V x 200/9000.
For larger room sizes, typically from 30 m2 to 120 m2:
- Room with dimensions: (3 x 4 x 3.5) m3 = 42 m3, then choose a 1 HP air conditioner.
- Room with dimensions: (4 x 5 x 3.5) m3 = 70 m3, choose a 1.5 HP or 2 HP air conditioner.
- Room with dimensions: (5 x 6 x 3.5) m3 = 105 m3, you will choose a 2.5 HP air conditioner.
Above are insights on calculating air conditioner capacity for suitable room size to help you make a choice based on your usage needs and your family's budget.
Another crucial aspect to consider is the air conditioner's capacity, which is also influenced by external factors such as sunlight exposure, room insulation, window size and location, and most importantly, the number of people in your room—whether it's crowded or not. Therefore, a uniform standard cannot be applied to all room types.
To save on costs, you should also consider whether you should buy an air conditioner or an air cooler, or another cooling device. Refer to Mytour's additional insights for reasonable choices!
