8 Best Aircon Installers in Singapore (November 2026)

A "System" number tells you how many indoor units share one outdoor compressor. System 1 is one fan coil and one compressor. System 4 is four fan coils on one compressor, which is what most 4-room and 5-room HDB flats end up with: three bedrooms and the living room.

Then size each room. A 9,000 BTU unit suits a common bedroom, a master bedroom usually takes 12,000 BTU, and a living room 18,000 to 24,000 BTU. An installer who looks at the room before quoting will tell you if the west sun or a high ceiling needs more.

When the quotes come in, read them line by line. A good one names the brand and model of every unit, the length of copper piping included, the trunking, the bracket or ledge, the isolator, and what happens to the old system. These are the add-ons Jex Aircon publishes, and they give you a sense of what a short quote is leaving out:

Every new split aircon sold here since 1 October 2022 runs on a refrigerant with a global warming potential of 750 or less, under the rule the National Environment Agency brought in. In practice that is R32. So a replacement is always a full new system, and when the compressor fails on an old R22 or R410A system, that is usually the point to stop repairing.

Ratings are each company's main Google listing, checked on 13 November 2026. The warranty column is the installer's own warranty on its work. The manufacturer's warranty on the units, often five years or more on the compressor, sits on top of it.

If you are looking for an aircon installer in Singapore and none of these suit you, these are the checks I would run on any other company.

• A BCA trained installer for the outdoor unit. Under Regulation 41B of the Building Control Regulations, only a trained installer may fix an aircon unit outside a building or on a part that projects from it. The Building and Construction Authority says that installer must hold an identification pass, use a stainless steel bracket or a concrete ledge, and submit an installation report within 14 days (Form AC-02 for an HDB flat). Ask for the pass number. BCA Academy keeps the list of trained installers.
• Technicians trained on refrigerant. NEA points household aircon technicians to the ITE Certificate of Competency in Residential Air-Conditioning System (Refrigerant), and publishes a list of those who have completed it. R32 is mildly flammable, which is why the training matters on a new system.
• The workmanship warranty, in writing. Ninety days is the norm. Jex Aircon and Infinite Aircon give three years, and that gap matters more than S$100 on the quote.
• Every extra priced before work starts. Piping length, the isolator, the bracket, the water tray, dismantling. If the quote is one line, ask for the rest.
• The HDB rules for your flat. HDB says flats with a 40A main switch, or flats that have been through the Main Upgrading Programme or Home Improvement Programme, need no permit for aircon installation. Older flats on a 30A main switch have extra requirements, so check before you book.

If you are renovating at the same time, plan the trunking and the isolator with your contractor first. My guides to the best renovation contractors in Singapore and BTO interior designers cover who to talk to, and any new power point needs a licensed electrician, so my list of the best electricians in Singapore is worth keeping open.

I started with the companies that come up when you search for aircon installation in Singapore, then read each one's installation, repair and pricing pages. I kept the ones that publish what their installation covers, name a workmanship warranty, and hold a solid Google rating across at least a hundred reviews. Ratings were checked on 13 November 2026, and prices are as listed on each site that week.

I have not hired all eight, and prices move with promotions and the brands' own price lists. Use this as a shortlist, and get two or three written quotes for the same units before you choose.

Aircon installation in Singapore costs about S$850 to S$1,000 for a System 1, S$2,100 for a System 2, S$3,000 for a System 3 and S$3,700 to S$4,300 for a System 4, going by the package prices the installers here publish for the units with installation. The brand and the energy ticks move it from there, and extra piping, an isolator and a bracket are usually charged on top.

DW's catalogue doesn't spell out the installation in its prices, so confirm the pipe length and the removal of the old units. New BTO flats often pay a piping surcharge, from S$200 a unit at Jex, and a condo or landed home with concealed or long pipe runs costs more again.

Repair an aircon in Singapore when the fault is a part: a fan motor, a PCB, a capacitor or a leak that can be found and fixed. Replace it when the compressor fails on an older system, or when it runs on R22, because new units here have used lower-impact refrigerants since 1 October 2022 and an old system only gets harder to keep going.

Start with a diagnosis. SoCool charges S$42.80 and waives it if you go ahead with the repair, GoodCool charges S$43.60 a unit, and Billy Aircon S$40 or S$50. If the repair quote comes close to half the price of a new system, I would put the money into the new one.

HDB aircon installation follows two sets of rules. BCA requires a trained installer with a BCA pass for any outdoor unit, mounted on a stainless steel bracket or the concrete aircon ledge, with the installation report (Form AC-02 for HDB flats) filed within 14 days. HDB decides whether you need a permit, which depends on your flat's main switch.

Flats with a 40A main switch, which covers blocks completed from 1 January 1994 and flats upgraded under MUP or HIP, need no permit for the aircon. Older 30A flats need an HDB permit for a new 15A power point, and HDB allows a 20A isolator only for an aircon. Your installer should know which applies, and if they don't, that tells you something.

Aircon installation takes about two to five hours for a single split unit and a full day for a System 3 or System 4 in an HDB flat. Jetstyle aims to finish in about five hours, GoodCool quotes two to four hours for a single split, and Jex says most HDB installations finish in a day. Removing an old system with fixed trunking, or a long pipe run, adds time.

Yes. Climate Vouchers can be spent on 5-tick air-conditioners. HDB households received S$300 in vouchers in 2024 and a S$100 top-up in 2025, and the NEA says they are valid until 31 December 2027. Several installers here, including Jetstyle and Jex, explain how to use them on a system bought through them.

Ask whether the voucher comes off the price of the unit or the whole package, and get it shown on the quote.

Service a new aircon about every three months if you run it most nights, which keeps the drainage clear and the coil free of mould. Check your manufacturer's warranty card for its own servicing terms, and keep the receipts. My guide to the best aircon servicing companies in Singapore compares who to call and what each type of service costs.

If a job goes wrong and the installer won't come back, CASE handles consumer disputes in Singapore. Keep the written quote and warranty, because they are your evidence.