How do I choose the right aircon in Singapore?
Size each room correctly in BTU, pick an inverter model with a good NEA energy label, and choose a brand with strong local spare-parts support and easy servicing. Then insist on a careful installer, because piping, vacuuming and placement decide how well even a good unit performs. Key takeaways
- Parts support beats features: judge a brand on whether it still supplies parts for 6 to 8 year old models.
- Energy ticks are close: most models from the major brands now carry five ticks, so the label rarely decides it.
- Sizing is per room: bedrooms commonly take 9,000 or 12,000 BTU fan coils, living rooms 18,000 or 24,000 BTU.
- The installer matters most: testing the pipes for leaks and pumping out air and moisture decide how long the system lasts. In the video above, Uncle Eric walks through the five criteria our team uses to judge aircon brands, based on what we see when we open units up for servicing and repair.
What should I check before buying a new aircon?
Use this checklist when comparing quotes. Each row is something you can ask the seller or installer directly.
What to check | What a good answer looks like | Why it matters |
|---|---|---|
Cooling capacity (BTU / kW) | Each room sized from floor area, sun and use: commonly 9,000 BTU (about 2.6 kW) or 12,000 BTU (about 3.5 kW) for bedrooms, 18,000 BTU (about 5.3 kW) or 24,000 BTU (about 7.0 kW) for living rooms | Undersized units run flat out; oversized units remove less humidity |
NEA energy label | Five ticks on the model you are quoted, not just the range | More ticks means lower running cost; compare the yearly kWh on the label for the exact combination you are quoted |
Inverter | Inverter compressor | It speeds up and slows down instead of switching fully on and off, so it is quieter and uses less power |
System 1 to 4 | System 1 is one outdoor and one indoor unit; System 2, 3 or 4 is one outdoor unit for two, three or four indoor units, matched to your layout | One outdoor unit saves ledge space, but if it fails every room on it loses cooling |
| Warranty | Manufacturer warranty on parts and a separate installer warranty on workmanship, both in writing | Leaks at flare joints, piping and drainage faults are workmanship, not the manufacturer's problem |
Will the brand still support your aircon in year eight?
A new aircon should last many years, so judge it on year eight, not year one. When we rate a brand, we look at:
- Technical support directly from the brand's service centre in Singapore.
- Spare-parts availability: does the brand keep buffer stock, and does it still supply parts for models that are 6 to 8 years old or older?
- Ease of troubleshooting: Daikin's error codes and Mitsubishi Electric's blinking-light diagnosis make faults quicker to pin down, which means shorter repair visits.
- Lifespan of major components: fan motors, sensors, Wi-Fi modules and the PCB (the main control board).
- Coil durability: how likely is the evaporator coil to develop a gas leak over time? A coil that leaks early is one of the most expensive problems an owner can face.
Why does ease of servicing matter?
It decides how clean your aircon stays for its whole life. If the blower fan, filters and covers come off and go back on easily, the technician spends the visit cleaning rather than fighting clips and hidden screws. Units with fiddly parts tend to get cleaned less thoroughly, and parts break more often, especially when cables sit deep around the circuit board. What we have seen in our servicing work:
- Toshiba: some models hold the blower fan shaft with a tiny Allen key screw that is easily lost, which makes DIY cleaning risky.
- Panasonic: on recent models, the plastic on air filters and air flaps has become more brittle and can crack when removed for cleaning.
- Mitsubishi Electric Starmex: parts are easy to remove and fix back, and they rarely break during cleaning. The Starmex models we have reviewed have no built-in Wi-Fi or mobile app, so check this if app control matters to you.
How do Singapore homes affect the choice?
Most HDB flats, BTOs and condos here use a multi-split System 2, 3 or 4, so the outdoor unit has to match the combination of indoor units you choose. West-facing and top-floor rooms run hotter and may need the next size up. If matching colours matter, check every capacity, not just the bedroom size: Uncle Eric points out that Fujitsu's airstage range comes in black at 9,000 and 12,000 BTU, but the larger living-room sizes are white only. Toshiba's Haori models take the opposite approach, with washable, replaceable fabric covers so you can change the colour later.
In what order should I make the decision?
- List each room with its size, sun exposure and how many hours a day it is used. Our free aircon BTU calculator turns that list into a size for every room and tells you how many systems you need.
- Ask the installer to size each fan coil and match one outdoor unit to the System 2, 3 or 4 combination.
- Shortlist inverter models with five NEA ticks from brands with strong local parts support. Once you have a shortlist, ask us about supply and installation.
- Check how easily the blower fan, filters and covers come off for cleaning.
- Get the manufacturer warranty and the installer's workmanship warranty in writing.
- Confirm the installer will test the pipes for leaks, pump out the air and moisture before the gas goes in, and leave the outdoor unit open space to breathe. Our post on why evacuation matters explains that step. If your system is already in and cooling poorly, see why a new aircon may not cool well.
When to call a technician
Get a technician involved before you buy if you are replacing an old system and are unsure whether the existing piping, trunking or outdoor ledge can be reused. After installation, call one if the new aircon:
- takes a long time to cool, or never reaches the set temperature
- leaks water from the indoor unit or the trunking
- makes rattling or buzzing noises
- shows a blinking light or error code We install new systems through our aircon installation service, from S$500 for the labour, with supply added when the job needs it and a workmanship warranty from 12 months. To have an existing setup checked, book online in under a minute, or ask which system suits your home by chatting with Luna on WhatsApp any time.
Frequently asked questions
How many aircon systems do I need?
It depends on how often the living room aircon runs. If it runs most days, or living and dining together are at least twice the size of the master bedroom, give the living room its own system, for example System 3 for the bedrooms and System 2 for living and dining. Otherwise one system of up to four indoor units can cover the home. Our free BTU calculator works it out for your rooms.
Is a System 4 better than four separate aircon units?
A multi-split System 4 uses one outdoor unit for four indoor units, which saves ledge space and suits most HDB and condo layouts. The trade-off is that if the shared outdoor unit fails, every room on it loses cooling at once, so brand reliability and parts support matter even more.
Can I reuse my old aircon piping with a new system?
Sometimes. The installer needs to check the pipe sizes match the new units, that the copper and insulation are in good condition, and then flush the pipes and test them for leaks before use. If any of those checks fail, new piping is the safer choice.
Do I need to service a brand new aircon?
Yes. A new aircon collects dust and grows mould on the coil and blower fan just like an old one, especially in Singapore's humidity. Many manufacturer warranties also expect regular servicing, so check your warranty terms and keep your service records.
Are cheaper aircon brands worth buying?
A low price can make sense for a room you rarely use, but check the brand's local service centre, spare-parts stock and how easy the unit is to clean. In our experience, coil durability and parts support are where cheaper brands most often fall behind.
Does a smart aircon with an app save more electricity?
Not by itself. An app lets you switch the aircon on or off remotely, which is convenient, but the electricity use depends on the compressor, the sizing and how clean the unit is kept. A well-sized inverter model without an app can cost less to run than a poorly sized smart one.
Eric Lim, aka Uncle EricFounder of iAircon.Repair, now in its 10th year servicing aircons in Singapore. Some of our jobs are filmed, and you can watch the work on YouTube.
