LG 5 kW split system
$2,100–$3,300
estimated installed price
Cooling
5 kW
3 stars
Heating
5.1 kW
2.5 stars
Indoor noise
57.6
dB(A) sound power, quieter than 80% of its size
Running cost
$359
a year, average zone, at 33c/kWh
Short answer
The LG 5 kW split system (LS18S0U DX6ALAP/LS18S0N DX6ALAP) is a 5 kW reverse cycle wall split rated 3 stars for cooling and 2.5 stars for heating in the average climate zone. Installed, expect $2,100 to $3,300; the label's figures put running costs near $359 a year in an average-zone home.
Prices are estimates, not quotes (how we estimate them). Rebate rules checked September 2026.
Compare 3 quotes for my houseFull specifications
- Brand
- LG
- Model numbers
- LS18S0U DX6ALAP/LS18S0N DX6ALAP
- Type
- Wall split, reverse cycle (heats and cools)
- Cooling capacity
- 5 kW
- Cooling power input
- 1.52 kW
- Heating capacity
- 5.1 kW
- Heating power input
- 1.23 kW
- Annual efficiency, cooling (AEER)
- 3.26
- Annual efficiency, heating (ACOP)
- 4.09
- Indoor sound power
- 57.6 dB(A)
- Outdoor sound power
- 63 dB(A)
- Refrigerant
- R32
- Power supply
- Single-phase
- Demand response capable
- Yes
- Country of manufacture
- China
- Energy Rating registration
- AAC10343
- Registration valid until
- 2031-07-30
Star ratings and running cost by climate
The Zoned Energy Rating Label rates each unit for three climates. Annual energy is the label's estimate for typical use in that zone; the cost applies 33c/kWh, around the 2026–27 default electricity offer. Use the running cost calculator for your own hours and tariff.
| Climate zone | Cooling stars | Heating stars | Energy a year | Cost a year |
|---|---|---|---|---|
| HotBrisbane, Darwin | 3.5 stars | 3 stars | 1,312 kWh 1209 cooling, 103 heating | $433 |
| AverageSydney, Adelaide, Perth | 3 stars | 2.5 stars | 1,087 kWh 430 cooling, 657 heating | $359 |
| ColdCanberra, Hobart, Melbourne | 3 stars | 2 stars | 2,018 kWh 271 cooling, 1747 heating | $666 |
How it compares with other 5.0 kW units
- Cooling stars (average zone): 3 against a median of 3.5 across 307 5.0 kW wall split units, better than 6% of them.
- Indoor sound power: 57.6 dB(A) against a median of 60 dB(A), quieter than 80%.
- Estimated installed price for this size: $2,100 to $3,300. Brand and install difficulty move it within that band.
See the quietest and most efficient rankings.
Alternatives at 5.0 kW from other brands
Daikin Alira X 5 kW split system
RXM50AVMA / FTXM50AVMA
5 stars cooling · 61 dB(A)
Daikin Alira X 5 kW split system
RXM50WVMA / FTXM50WVMA
5 stars cooling · 61 dB(A)
Panasonic HZ Series 5 kW split system
CU-HZ50DKR / CS-HZ50DKR
5 stars cooling · 61 dB(A)
ActronAir Serene 5 kW split system
WRC-050DS / WRE-050DS
5 stars cooling · 61.5 dB(A)
Midea EOS 5 kW split system
MFEP50VB-W/MFEP50VB-N
5 stars cooling · 61.5 dB(A)
Hitachi airHome 600 5 kW split system
RAC-VJ50PHAT/RAK-VJ50PHAT
5 stars cooling · 62 dB(A)
FAQ
LG LS18S0U DX6ALAP/LS18S0N DX6ALAP: common questions
How much does the LG 5 kW split system cost installed?
Typically $2,100 to $3,300 supplied and installed in 2026 for a standard job at this size. Longer pipe runs, a new circuit, a second storey or removing an old unit add to it. Get up to three local quotes for your actual install.
How much does the LG 5 kW split system cost to run?
Using the energy label's annual figures at 33c/kWh: about $433 a year in a hot zone, $359 in an average zone and $666 in a cold zone. The label assumes typical use; yours will differ with hours, set temperature and insulation.
Where is the LG LS18S0U DX6ALAP/LS18S0N DX6ALAP made?
The Energy Rating register lists the country of manufacture as China.
Is the LG 5 kW split system quiet?
Its registered indoor sound power is 57.6 dB(A), against a median of 60 dB(A) for 5.0 kW wall split units, so it's quieter than about 80% of them. Brochures quote a lower sound pressure figure on the lowest fan speed; the register measures every model the same way.
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