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Aircon Buying Guide Singapore

Aircon Buying Guide Singapore


With the range of air conditioners available in the country, buying air conditioners in Singapore is still no easy feat. Merely choosing an air conditioner with the “best” features will not do it. You also need to consider several factors and understand certain terms. Let us guide you through the essential things you need to know before delving into buying an aircon.

Aircon Terms That You Should Know

Confused about certain aircon jargon? We’re here to help!

Before taking on the task of buying a new aircon in Singapore, it is important to first understand some of the basic concepts being used.  Not only will this aid you in your task, but it will also help you choose the perfect air conditioner that best suits your needs.

  • British Thermal Units (BTUs)
    • BTUs are used to measure an air conditioner’s cooling capacity. It is the amount of heat your aircon can remove from a certain room per hour. The higher the BTU, the more powerful the cooling capacity will be. As such, bigger rooms usually require air conditioners with large BTU.
  • Efficiency Rating (EER)
    • EER measures the amount of BTU produced by the aircon with 1 watt of energy per hour. In Singapore, the legal minimum is 10. A higher EER denotes more savings in the long run, but a higher initial cost. You would benefit more from a higher EER if you use your aircon every night compared to someone who only uses it 2 to 3 times a week.


  • Refrigerant
    • The working fluid for the aircon is called the refrigerant. It is essential in the heat removal process of the cooling mechanism as it changes from gas to liquid and back to gas. There are two types of refrigerants mostly used in Singapore – R22 and R410A. However, R410A is more commonly being used nowadays as it is more efficient and environmentally friendly.
  • Inverter
    • Deemed as the more preferable type of air conditioner in Singapore, an inverter aircon has a speed compressor. This means that the running speed of the aircon is reduced once the desired temperature is achieved. With inverter air conditioners, you’ll be able to get at least 30-50% of energy savings compared to non-inverter air conditioners.


  • Indoor Unit or Fan Coil Unit (FCU)
    • The FCU unit is the aircon unit inside your home.


  • Outdoor Condensing Unit (CDU)
    • A rectangular shaped unit mounted outdoors that is usually confused with the compressor
  • Compressor
    • The main component of the air conditioner found inside the outdoor unit.
  • Multi-Splits (System 2, 3, or 4)
    • Multi-split air conditioner systems come with 1 outdoor unit to a specified number of indoor units. For instance, a System 3 aircon will have 1 outdoor unit to 2 indoor units.

Types of Air Conditioners in Singapore

While multi-splits are more commonly seen in Singapore households, there are also other types of air conditioners being used in some areas.


  • Casement Aircon (Room Air Conditioner)
    • As the cheapest option, room air conditioners usually only have a lifespan of 10-15 years. However, it is also considered the most popular cooling system being the most affordable choice as there is no further piping required during installation.


  • Portable Aircon
    • A portable aircon remain a suitable option for people on a budget or living in a rental property. Not only is it easy to set-up, but it is also be used and transferred to different rooms. The only downside is that it may not have the same cooling capacity as other types of air conditioners and it also takes up floor space.



  • Inverter Multi-Split System
    • As the most cost-efficient type of air condition, the multi-split has 1 outdoor unit that can connect up to 4 indoor units at the same time. They range from system 2, 3, 4 and even 5. Professional installation and usage might cost more, but it incurs more savings in the long run.

Things to Consider When Buying an Aircon in Singapore

Now that you know more about the basic concepts and different types of air conditioners in Singapore, it’s now time to go through important factors to consider when choosing an air conditioner.

  • Number of Rooms
    • Single room: If you’re only planning to cool one room, a casement or portable air conditioner would be best for you.
    • Multiple rooms: An inverter multi-split system would be more preferable to cool two or more rooms.
  • Size of the Area You’re Planning to Cool
    • As mentioned earlier, an aircon’s cooling capacity is determined by its BTU rating. The number of BTUs needed for a certain room is calculated by multiplying the square foot of the room by 35. As such, a typical HDB flat bedroom usually needs about 9,000 BTU worth of cooling capacity. To calculate the BTU required for your room size, you can refer to the chart below.


  • Amount of space you have
    • While it is important to consider the area that you want to cool, it is also essential to take note of whether you have the space for the air conditioning unit. As such, inverter air conditioners are more preferable when you have limited space compared to casement air conditioner.
  • Noise levels
    • If you’re mostly planning to use your air conditioner in the evening, opt for an inverter aircon. Inverter air conditioner models operate on 19dB, which is quieter than a sound studio!
  • Energy Efficiency
    • Aside from knowing what an EER is, you should also look out for the National Environment Agency’s (NEA) Energy Label. This labeling scheme operates on a “Tick-Rating System where it ranges from 1-tick (least energy efficient) to 5-tick (most energy efficient). Most aircon models have 2, 4, and 5 ticks. The higher the number of ticks, the less power the aircon uses to perform a similar task compared to other air conditioners. This not only translates to lower greenhouse emissions but also to more energy savings that lead to cheaper electricity bills. Here’s how to read the label:


Choosing Additional Features to Suit Your Needs

With a wider range of aircon brands and models available nowadays, it is possible to choose additional air conditioner features to better suit your needs. While you’re at it, you can also browse through the top 3 best-selling aircon brands in Singapore.

  • Programme Timer
    • A programme timer on your remote control enables you to turn on the aircon half an hour before you get home and switch it off when you’re asleep. Most remote controls with programme timers also have sleep/energy saver settings.


  • Slide-out Filter
  • Dirty Filter Indicator
  • Air Purifying Function
    • Some aircon models also have an air purifying function that can reduce microscopic contaminants and dust being released from the air conditioning unit. Want cleaner air for your room? Check out Mitsubishi’s Starmex Series.


  • Motion-detector Sensors
    • Newer aircon models already have motion-detector sensors that adjust power consumption according to the amount of movement in the room. If you’re looking for this specific feature, look no further as Panasonic’s INVERTER XS series use ECONAVI technology with intelligent eco sensors.
  • Wifi-enabled
    • Ever forgotten to turn off your aircon before leaving the house? With wifi-enabled air conditioners, you can control your aircon from outdoors with just a click on your smartphones. You can enjoy this feature with Daikin’s Smiles Series such as model CTKS25QVM.

Have a better understanding of air conditioning units? It’s now time to start planning on getting the work done. Read our comprehensive aircon installation guide!

Ready to buy an aircon in Singapore? Browse through our wide range of aircon brands and models here*!
*Prices include premium installation with upgradable materials.
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