Mitsubishi Heavy Industries SCM30YS-W
5.95 kW · 5 green ticks · also registered as DXM30YS-W
The outdoor unit of a multi split system. Costs about $52 a month to run — here is how that compares with every other system its size on Singapore's NEA register.
Is the SCM30YS-W expensive to run?
A bit, yes. Of the 23 systems on Singapore's register around this size, 12 cost less to run.
Runs at
$52/month
About $628 a year
Cheapest its size
$48/month
Daikin MKM75ZVMG
Size group
5.5–6.4 kW
23 systems, all brands
That is about $5 a month more than the cheapest system its size, or roughly $570 over ten years — before you weigh purchase price, which often runs the other way.
It is not an inefficient unit, though. It sits at the larger end of its size group, so it works harder for the same rating. On efficiency alone it ranks 11 of 23 — middle of the pack.
Looking at the SCM30YS-W for your home?
This is the outdoor unit only, and on a multi-split it is shared across rooms. What decides the job is what goes inside them.
What to pin down before you commit
- One indoor model number per room, not just a room count
- The capacity of each indoor unit, and which room it serves
- Whether every room can run at once at full output, or the system is sized for typical use
- What happens to the existing piping and drainage, and whether it is being reused
A multi-split can be built many ways, and the register carries one figure per registration. The running cost above is for the configuration NEA tested — yours depends on how many indoor units end up on it and how hard they work.
Figures are NEA energy-label records checked 22 Jul 2026, priced at the label's 27¢/kWh assumption. Your own bill depends on how you actually use it. compare every registered model. More on Mitsubishi Heavy systems, or read up on common aircon problems.
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