LG 7.1 kW split system
$2,600–$3,900
estimated installed price
Cooling
7.1 kW
3.5 stars
Heating
8 kW
2.5 stars
Indoor noise
67
dB(A) sound power, quieter than 3% of its size
Running cost
$540
a year, average zone, at 33c/kWh
Short answer
The LG 7.1 kW split system (WH24SLU-18 / WH24SLN-18) is a 7.1 kW reverse cycle wall split rated 3.5 stars for cooling and 2.5 stars for heating in the average climate zone. Installed, expect $2,600 to $3,900; the label's figures put running costs near $540 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
- WH24SLU-18 / WH24SLN-18
- Type
- Wall split, reverse cycle (heats and cools)
- Cooling capacity
- 7.1 kW
- Cooling power input
- 1.89 kW
- Heating capacity
- 8 kW
- Heating power input
- 1.99 kW
- Annual efficiency, cooling (AEER)
- 3.75
- Annual efficiency, heating (ACOP)
- 4.02
- Indoor sound power
- 67 dB(A)
- Outdoor sound power
- 62 dB(A)
- Refrigerant
- R32
- Power supply
- Single-phase
- Demand response capable
- Yes
- Country of manufacture
- Thailand
- Energy Rating registration
- AAC7513
- Registration valid until
- 2028-05-16
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 | 1,922 kWh 1781 cooling, 141 heating | $635 |
| AverageSydney, Adelaide, Perth | 3.5 stars | 2.5 stars | 1,634 kWh 596 cooling, 1038 heating | $540 |
| ColdCanberra, Hobart, Melbourne | 3.5 stars | 2 stars | 3,354 kWh 376 cooling, 2978 heating | $1,107 |
How it compares with other 7.1 kW units
- Cooling stars (average zone): 3.5 against a median of 3.5 across 207 7.1 kW wall split units, better than 49% of them.
- Indoor sound power: 67 dB(A) against a median of 63.8 dB(A), quieter than 3%.
- Estimated installed price for this size: $2,600 to $3,900. Brand and install difficulty move it within that band.
See the quietest and most efficient rankings.
Alternatives at 7.1 kW from other brands
Haier 600 Series Q 7.1 kW split system
1U71WAEFRA / AS71QEEHRA
4.5 stars cooling · 62.2 dB(A)
Braemar 7.1 kW split system
ACHV70D1S/ASHV70D1S
4.5 stars cooling · 68.7 dB(A)
Gree Alto 7.1 kW split system
GWH24ATEXF-K6DNA2E
4.5 stars cooling · 68.7 dB(A)
Midea EOS 7 kW split system
MFEP70VA-W/MFEP70VA-N
4 stars cooling · 59.9 dB(A)
Haier 600 Series QP 7.1 kW split system
1U71WAFFRA / AS71QEFHRA
4 stars cooling · 62.2 dB(A)
AUX 7 kW split system
ASW-H71A4/CAR3DI
4 stars cooling · 62.4 dB(A)
FAQ
LG WH24SLU-18 / WH24SLN-18: common questions
How much does the LG 7.1 kW split system cost installed?
Typically $2,600 to $3,900 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 7.1 kW split system cost to run?
Using the energy label's annual figures at 33c/kWh: about $635 a year in a hot zone, $540 in an average zone and $1,107 in a cold zone. The label assumes typical use; yours will differ with hours, set temperature and insulation.
Where is the LG WH24SLU-18 / WH24SLN-18 made?
The Energy Rating register lists the country of manufacture as Thailand.
Is the LG 7.1 kW split system quiet?
Its registered indoor sound power is 67 dB(A), against a median of 63.8 dB(A) for 7.1 kW wall split units, so it's quieter than about 3% 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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