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How to Choose the Right Aircon Size & Capacity for Your Home


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Cool and comfortable rooms are possible with the perfect aircon unit. These are necessities in order to maximize one’s apartment or new office space. But before anything else, installing the right aircon system entails purchasing the perfect model that fits your room’s requirements.

Finding the correct size matters when choosing the right air conditioner for yourself. Whether you stay in a studio pad or an open office, air conditioner performance will depend on how compatible it is with the room. In addition, other factors such as determining the ceiling’s height, type of climate, and exposure to the sun all play a role in this buying process.

With everything that needs to be considered, we’ve summarized three important points to remember when finding the best air conditioner size for your home or office. 

How to Select the Right Air Conditioner Size

Room Size Knowledge

Air conditioners in Singapore are available in various sizes that the measurement of the room plays a crucial role in selecting your model. In order to have an idea of the perfect air conditioner size to room ratio, one has to understand the British Thermal Unit or BTU.

BTU is a measure of the heat content of fuels or energy sources. In relevance to air conditioner size, it is the cooling capacity of a unit for a particular area. Obtaining the square feet of the room is significant as it helps you estimate an actual figure of the BTU needed.

It’s also critical to take note of the capacity of people who stay in a certain area. If more than two people occupy the room, around 600 extra BTUs are supposed to be added per person. Knowledge of these room dimensions will help you approximate the BTUs you need as there are tools online that can help with computations.

This BTU calculator will do all the math for you as long as you have all the measurements ready. All you have to do is to be equipped with the foresight of your future activity and have the ability to evaluate your room’s proportions.

Cooling Capacity

The next thing to take note of is the cooling capacity needed in your room. A mismatch in the aircon size and the room may cost more than to operate as it might not properly dehumidify the space — either from an excess or inadequate amount of cooling.

Using a rule of thumb of dividing the area of space by five will yield a safe idea of the cooling capacity required. For example, the total cooling capacity of a multi-split air-conditioner is the sum of the cooling capacities of the individual rooms. However, a smaller total cooling capacity may be sufficient if all the room units are not turned on at the same time.

It’s important to note that a larger air conditioning unit may be needed for rooms with double the ceiling height, full-height glass windows, or exposure to the sun, or additional heat sources.

Read also: How to Choose an Energy-Efficient Air Conditioner

Checking BTU or British Thermal Units

Overall, whether it’s room size or the air conditioner’s cooling capacity, it’s important to be aware of the BTU level. Other than the aforementioned online calculator, there are more resources available to assist in determining the BTUs needed per room size.

Before consulting your air conditioning unit supplier for assistance, keep in mind this table that can give a good idea of how much cooling power you actually need.

Choosing Your Next Air Conditioning Unit

For more expert advice and relevant details on your air conditioner needs, visit our content hub! From helping you choose from the best air conditioner retailers to giving the best advice of what size and type of air conditioners to get, we’ll guide you every step of the way.

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Staff Writer

This article is written by our passionate staff writers who seek to share our knowledge from our business

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