It is indubitable how the use of aircon turned out to be one of the most essential appliances in Singapore due to the hot and humid weather Singapore, which is why choosing a good and reliable aircon for residential and commercial premises is one of the main concerns of Singaporean citizens. Air-conditioners are a must-have in a tropical climate or countries where the weather can be unmercifully hot. In Singapore, especially during certain parts of the year, the air-conditioner keeps us out of the haze by cleaning the air via a filter. Buying an air-conditioner is a huge investment, which is why it is important to know what you are paying for. The numerous models available in the market can be confusing, but Cool World Aircon break it down into 10 things that you should know before putting down a deposit.

  1. Multi-split system air conditioning unit cools two to nine rooms with only one outdoor unit, but allows individual control in each room.
  2. Refrigerant or gas uses the working fluid for air-conditioners. R22 or R410A is usually used but R22 is being gradually phased out due to the Montreal Protocol, which seeks to end production of HCFCs (hydrochlorofluorocarbons). R410A is more energy-efficient and environment friendly in comparison.
  3. System 2, 3, 4, or 5 refers to the number of indoor units to one outdoor unit. The System 1 refers to one indoor unit to one outdoor unit and is also known as a single split.
  4. Insulation refers to the material used to cover the copper pipe, usually rubber foam, which helps to absorb water droplets formed due to condensation on the copper pipes when the air-conditioner is operating. There are generally two types of insulation, the Class 0 and Class 1. An inferior quality will result in a higher condensation rate and cause leakages. 3/8 inches is usually recommended for the piping in trunking (plastic casing that encases the copper pipes, PVC drainage pipes and wiring) while ½ inches is preferred for piping that will be hidden by false ceilings or concealed in walls or high humidity area.
  5. Grade or gauge refers to the thickness of the copper pipe; generally a thicker copper pipe is able to withstand a higher operating pressure. The grade varies from the lowest SWG (standard working gauge) or G25 (0.51mm) to G21 (thickest). For HDB owners, the G23 (0.61mm) is usually recommended. For those who have concealed piping, then G22 (0.71mm) is a better option. Another thing that one should take note is the bending of the copper piping. To lower the odds of condensation or poor refrigerant flow (which will make the air-conditioner less cold), make sure that the piping is bent with a proper pipe bender (thus ensuring a pipe bent of about 90 degrees).
  6. Compressor refers to the main component of the outdoor unit.
  7. Electrical Loading should also be noted. If you live in an old HDB block that was completed before 1 January 1994, you’ll need to apply for a HDB permit in order to install new 15-amp power points or 20-amp isolator for air-conditioners. This is because they haven’t been provided with a higher electrical loading, unlike the newly completed flats or flats that had undergone the Main Upgrading Programme (MUP)/Home Improvement Programme (HIP). At the end of the day, it’s your responsibility to ensure that your air-conditioner’s running current doesn’t exceed the current limit of your flat. Not sure about your block’s electrical loading? Then visit the HDB website or call them on their toll-free line at 1800 225 5432.
  8. Installation, in which it is advised that your installer should be a BCA-certified technician to ensue a proper installation according to HDB and BCA guidelines.
  9. PVC drainage pipe, since installers generally use one of two sizes available in the market which are the 3mm and 16mm (referring to the pipe’s internal diameter). Using a bigger size will mean that the air-conditioner is able to drain water faster and slow down the possibility of leakage.
  10. Wiring in which are three types which are usually used to connect the air-conditioner to its power source as well as connect the indoor units to the outdoor one. These are the 4C40 (4 wire cords, each with 40 copper stands), 3C70 (3 wire cords, each with 70 copper stands) and 3C40 (3 wire cords, each with 40 copper strands). The better grade will, of course, be the 4C40 and 3C70 ones. Avoid wiring that was manufactured in China. Singapore Famous Brand Cable Brand: Keystone, Sigma & Taisin.

Aircon Servicing is essential in keeping your aircon units in healthy and good condition to give you the utmost comfort you deserve.

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