Somewhere in the middle of a renovation quotation there is usually a single line that reads something like "Aircon System 3, supply and install", with one number next to it. It sits between the carpentry and the electrical, it is easy to approve, and most people approve it without another thought. It is one of the larger single items in the whole renovation and it is the one people examine least.
This is not an argument that buying through your interior designer is wrong. Plenty of good installations get done that way, and there is a real service being provided. It is an argument that you should know what you are actually buying, because the two routes differ in ways that only show up long after the renovation is finished — usually in the second year, usually when something drips.
What that one line actually is
Almost no interior design firm in Singapore installs aircon itself. The line in your quotation is a subcontract. Your ID has an aircon installer they use, that installer has quoted the ID, and the ID has added something on top for carrying the coordination, the risk and the payment terms.
That margin is not a scandal. Somebody has to make sure the aircon crew turns up after the electrician and before the false ceiling closes, and that somebody is being paid for it. The question is not whether there is a margin. The question is what you get for it, and what you give up.
Four things that genuinely change
1. Who you call in month fourteen
This is the big one, and it is invisible on the day you sign.
When you buy direct, your contract is with the installer. If the drainage weeps in a year, you call the company whose name is on the invoice and they come.
When you buy through the ID, your contract is with the ID. The workmanship warranty lives with the installer, but your relationship does not. By month fourteen the ID's project is closed, the project manager who knew your job has moved on, and you are asking a busy firm to chase a subcontractor on your behalf for a job they finished a year ago and have already been paid for. It usually still gets sorted. It just takes three messages instead of one, and some of the time it does not get sorted at all.
Ask one question before you sign, and ask it in writing: who do I contact directly for warranty work, and what is their company name and number? If the answer is "just message us", you have learned something useful about the next two years.
2. You often do not know who is installing until they arrive
Buying direct, you can look the installer up before you commit. Buying through an ID, the crew's identity is frequently not disclosed, sometimes because the ID does not want you going direct next time. That is commercially understandable and it leaves you unable to check anything about the people drilling through your wall.
It also means the installer can change between quotation and installation without anybody telling you. The price you agreed was based on one company's rate; the crew that arrives may be whoever had capacity that week.
3. Sequencing — and this one cuts in the ID's favour
Aircon installation has to land at a specific point in a renovation. The refrigerant piping, the drainage and the power supply all have to be run before the false ceiling and the trunking boxing are closed up. Get it wrong and you are either cutting open finished work or leaving pipes exposed where they were meant to be hidden.
An ID who controls the whole programme can put the aircon crew in on the right day. That is a genuine benefit and it is worth paying for. Coordinating it yourself, across a contractor you did not hire, is real work.
The failure mode is when the programme slips. Aircon is often the item squeezed, because it is near the end and everybody wants to hand over. A squeezed aircon crew takes the shorter, easier pipe run rather than the correct one, and drainage gradient is where that shows up first — water needs a continuous fall to the discharge point, and a pipe that dips in the middle will eventually hold water and weep. You will not see that in the ceiling. You will see it as a stain on a wall two years later.
4. What is actually specified
"System 3" describes almost nothing. Two quotations both saying System 3 can differ on every point that matters:
- The capacity of each indoor unit, and whether it suits the room it is going into rather than being whatever came in the package
- How many metres of refrigerant piping are included, and what happens if the run is longer
- Whether the piping is new copper throughout or reusing existing runs left by the previous owner
- The insulation on the piping, which is what stops the pipe sweating inside your ceiling
- Where the condenser goes, and whether the brackets are appropriate for that ledge
- Whether the drainage discharges properly, or into a nearby floor trap that was not designed for it
- Whether the trunking route is agreed before it is fixed, or decided by the crew on the day
None of that is exotic. It is simply detail that gets flattened into one line when the aircon is a sub-item of somebody else's quotation.
The questions worth asking, whichever route you choose
- What make and model is each indoor unit, and what capacity?
- How many metres of piping are included, and what is the rate beyond that?
- Is the piping new, or reusing what is already in the wall?
- Who holds the installation warranty, for how long, and what is their direct contact?
- Which day in the programme is the aircon going in, relative to the ceiling?
- Where exactly is the condenser going, and has anyone looked at that ledge?
- Who is responsible if the ceiling has to be reopened afterwards?
A serious answer to question four is the one that separates the two routes most cleanly. On our own work the installation carries a two-year workmanship warranty and the units carry the manufacturer's five-year compressor warranty — two different clocks, held by two different parties. Whoever you buy from, you want to know who holds each one.
What to look at on installation day
You do not need to understand refrigeration to check three things while the crew is still there:
- The drainage runs downhill the whole way. Stand under it before the ceiling closes and look along the pipe. A visible sag is a future stain.
- The piping is insulated along its full length, including the joints and the section near the wall penetration. Bare copper in a warm ceiling void sweats.
- Ask them to run it and show you the air coming out is actually cold — not "feels cool", measured. Any installer worth using carries a thermometer and will not mind being asked.
That last one takes thirty seconds and is the single most useful thing a homeowner can ask for. It is also the moment where you find out whether the person in your house is proud of the work or in a hurry.
The honest case for each
Go through the ID if your renovation is large, the programme is tight, there is a false ceiling with a lot of services in it, and you value having one person accountable for clashes between trades. Coordination has real value and pretending otherwise is silly. Just get the installer's name and the warranty route in writing.
Go direct if the aircon is a reasonably self-contained job, if you want to choose the units rather than accept a package, or if you expect to still be in the flat in five years and want to know who to call. You will also usually see the actual price of the work rather than the price plus coordination.
There is a third option people forget: buy direct and tell your ID the date. Most IDs will happily sequence a contractor they did not hire, as long as they know when the crew is coming and who to call. It is the arrangement we work under most often, and it causes far less friction than either side expects.
If you want a direct quote to compare against
Send us the layout, the rooms you want cooled and where the condenser is meant to sit, and we will price it as its own job so you can hold it next to the line in your renovation quotation. If the ID's number turns out to be fair for what it includes, we will tell you that — it happens often, and you will have paid nothing to find out.
Servicing and installation prices are on the pricing page, and there is a full breakdown of what a job costs on our aircon installation cost page. It is also worth reading what a standard installation actually includes, what a workmanship warranty covers, and — because it is the scenario that makes the warranty question real — what happens when the installer closes down.
WhatsApp us on 9107 2601 — usually a reply within five minutes.