Mitsubishi Heavy Industries SRC18YYS-W8

The outdoor unit of a 4.98 kW single split system, rated 4 green ticks. 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 SRC18YYS-W8 expensive to run?

Yes, it's one of the pricier ones to run at this size. Of the 21 systems on Singapore's register around this size, 15 cost less to run.

Runs at

$52/month

About $624 a year

Cheapest its size

$41/month

Mitsubishi Electric MUY-GA18VF

Size group

4.6–5.4 kW

21 systems, all brands

That is about $11 a month more than the cheapest system its size, or roughly $1,350 over ten years — before you weigh purchase price, which often runs the other way.

Registered with the same figures as Mitsubishi Heavy Industries SRC18YYS2-W8. On paper they are the same machine.

Cheaper systems the same size

Systems around the same size that cost less to run, closest in size first. Cheaper to run is not the same as the better buy — purchase price, indoor units, and how well it is installed all sit outside these figures.

Cheaper systems of a similar size, closest in size first
Model	Capacity	Green ticks	Runs at	You would save
Toshiba RAV-GE1802AP-SG	4.99 kW	5 ticks	$46/month	$7/month
Panasonic CU-XU18XKZ	4.96 kW	5 ticks	$46/month	$6/month
Panasonic U-18PRH1Z5	4.95 kW	4 ticks	$41/month	$11/month
Daikin RZF50DVMG	5.02 kW	4 ticks	$42/month	$11/month

Model
Toshiba RAV-GE1802AP-SG
Capacity
4.99 kW
Green ticks
5 ticks
Runs at
$46/month
You would save
$7/month
Model
Panasonic CU-XU18XKZ
Capacity
4.96 kW
Green ticks
5 ticks
Runs at
$46/month
You would save
$6/month
Model
Panasonic U-18PRH1Z5
Capacity
4.95 kW
Green ticks
4 ticks
Runs at
$41/month
You would save
$11/month
Model
Daikin RZF50DVMG
Capacity
5.02 kW
Green ticks
4 ticks
Runs at
$42/month
You would save
$11/month

Looking at the SRC18YYS-W8 for your home?

This is the outdoor half of a pair. The indoor unit is the half you live with, and it should be named before anything is agreed.

What to pin down before you commit

The paired indoor model number — the unit that mounts in the room
Whether the capacity suits that room, and how that was decided
What happens to the existing piping, drainage and bracket
Whether the old unit is being removed and disposed of

Figures are NEA energy-label records checked 17 Sept 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 Industries systems, or read up on Common aircon problems.

Mitsubishi Heavy Industries SRC18YYS-W8 questions

Is the Mitsubishi Heavy Industries SRC18YYS-W8 the right size for my room?

The NEA register lists it at 4.98 kW of cooling capacity. Match that against the room's size and heat load rather than assuming one capacity suits every room, and have the installer confirm it before the unit is chosen.

What does the 4-tick rating on the SRC18YYS-W8 mean?

The NEA energy label rates it 4 of 5 green ticks, in the upper band for tested efficiency. Ticks describe energy use under the label test, not cooling strength, so compare it with units of the same size.

Is the SRC18YYS-W8 a single-split or multi-split system?

It is a single-split: one outdoor unit paired with one indoor unit, listed at 4.98 kW on the register. That makes it a one-room system, and the quote should name the paired indoor model.

Is the Mitsubishi Heavy Industries SRC18YYS-W8 still on the NEA register?

Yes. Its registration runs to 25 August 2027, more than four months after the 17 September 2026 snapshot this page is built from.

How efficient is the SRC18YYS-W8 at part load?

NEA records a part-load COP of 5.59 for the SRC18YYS-W8. Part-load efficiency describes how it performs when it is not running flat out, which is how it runs most of the time in a home.

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