Australia · costs in AUD
Reverse cycle split system air conditioner, wall hung
LG WS18TWU / WS18TWN Air Conditioner
LG WS18TWU / WS18TWN is a 4.8 kW reverse cycle split system air conditioner registered under Australia’s Energy Rating (GEMS) scheme (registration AAC8354).
- Energy rating (cooling)
- 3.5
- Heating: 2
- Annual electricity use
- 1,256 kWh
- 400 cooling + 856 heating
- Estimated running cost
- $402 / year
- $33 / month · $4,019 over 10 years
- Capacity
- 4.8 kW cooling
- 5.9 kW heating
15% more electricity than the median of 240 comparable 5 kW reverse cycle split system registrations (1,093 kWh a year) in the mixed zone. Uses less than 8% of them.
Across all 3,681 air conditioner registrations sold in Australia, it uses less than 70% (this compares very different sizes, so the cohort figure above is the useful one).
Annual kWh is the government label figure for a residential user in the mixed zone (Richmond NSW climate: Sydney, Melbourne, Adelaide, Perth). Mixed climate zone shown by default (Sydney, Melbourne, Adelaide, Perth); switch to cold or hot. Cost = kWh × 32c/kWh in AUD; change the price above to your tariff.
LG WS18TWU running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 2,712 | $868 | $8,678 |
| Mixed zone | 1,256 | $402 | $4,019 |
| Hot zone | 1,291 | $413 | $4,131 |
At 32c/kWh. Formula: cost = annual kWh × price. The kWh figure is the label’s residential estimate for that zone; commercial-profile figures are in the specifications.
Air conditioners that use less electricity
Same configuration and type, cooling capacity within 12% of 4.8 kW, at least 3% lower annual kWh in the mixed zone.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Daikin RXM46AVMA / FTXM46AVMA4.7 kW heating4.6 kW cooling839 kWh/yr | 4 | $268 | |
| Daikin RXM46WVMA / FTXM46WVMA4.7 kW heating4.6 kW cooling847 kWh/yr | 4 | $271 | |
| Actron Air WRC-050CS / WRE-050CS5 kW heating5 kW cooling942 kWh/yr | 4.5 | $301 | |
| Gree GWH15AGDXD-K6DNA1A/O / GWH15AGDXD-K6DNA1A/I4.7 kW heating4.6 kW cooling949 kWh/yr | 4 | $304 | |
| Panasonic CU-HZ50DKR / CS-HZ50DKR6 kW heating5 kW cooling949 kWh/yr | 5 | $304 |
Air conditioners similar to the LG WS18TWU
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Midea MFAG51VA-W/MFCS50VA-N5.5 kW heating4.9 kW cooling1,033 kWh/yr | 4 | $331 | |
| Comfee CASG-XG51/CASN-XG515.5 kW heating5 kW cooling1,050 kWh/yr | 4 | $336 | |
| Comfee CASG-XG50/CASN-XG505.5 kW heating5 kW cooling1,052 kWh/yr | 4 | $337 | |
| Daikin RXM46WVMA / FTXM46WVMA4.7 kW heating4.6 kW cooling847 kWh/yr | 4 | $271 | |
| Panasonic CU-HZ50DKR / CS-HZ50DKR6 kW heating5 kW cooling949 kWh/yr | 5 | $304 | |
| Actron Air WRC-050CS / WRE-050CS5 kW heating5 kW cooling942 kWh/yr | 4.5 | $301 | |
| Daikin RXM46AVMA / FTXM46AVMA4.7 kW heating4.6 kW cooling839 kWh/yr | 4 | $268 |
Other LG models of similar capacity
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| LG AS18S1U / AS18S1N5.2 kW heating4.8 kW cooling1,080 kWh/yr | 3.5 | $346 |
Compare WS18TWU / WS18TWN with another model
LG WS18TWU specifications
- Type
- Reverse cycle
- Configuration
- Split system
- Air distribution
- Non-ducted
- Indoor unit
- Wall hung
- Rated cooling capacity (35 °C)
- 4.80 kW
- Cooling power input
- 1.46 kW
- Rated heating capacity (7 °C)
- 5.90 kW
- Heating power input
- 1.68 kW
- EER, full load (tested)
- 3.57
- COP, full load (tested)
- 3.68
- Rated AEER
- 3.27
- Rated ACOP
- 3.51
- Standby power (PIA)
- 2.0 W
- Compressor
- Variable speed, Inverter
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 63.2 dB(A)
- Outdoor sound power
- 60.9 dB(A)
- Demand response (AS/NZS 4755)
- Yes
- Country of manufacture
- Thailand
Dimensions are not collected for registrations under the 2019 Determination, so they are shown only where the source has them.
LG WS18TWU zoned energy rating figures
As published for each climate zone. Residential figures drive the star ratings; commercial figures assume a commercial usage pattern.
| Zone | Profile | Cooling stars | Heating stars | Cooling kWh | Heating kWh |
|---|---|---|---|---|---|
| Coldcommercial | commercial | – | – | 425 | 767 |
| Coldresidential | residential | 3.5 | 1.5 | 248 | 2,464 |
| Mixedcommercial | commercial | – | – | 599 | 365 |
| Mixedresidential | residential | 3.5 | 2.0 | 400 | 856 |
| Hotcommercial | commercial | – | – | 1,480 | 72 |
| Hotresidential | residential | 3.5 | 3.0 | 1,176 | 115 |
Part-load test points (23 values)
- c__t1_min_cap_power_rated
- 380 W
- h__h2_ext_cap_power_rated
- 1870 W
- c__t1_half_cap_power_rated
- 490 W
- c__t1_have_min_cap_results
- Yes
- h__h1_half_cap_power_rated
- 597 W
- h__h1_have_min_cap_results
- No
- h__h3_have_ext_cap_results
- No
- h__h2_have_full_cap_results
- No
- h__h2_have_half_cap_results
- No
- h__h3_have_full_cap_results
- No
- h__h3_have_half_cap_results
- No
- h__h2_ext_cap_heat_cap_rated
- 4420 W
- h__h1_half_cap_heat_cap_rated
- 2950 W
- h__h2_is_capable_extended_load
- Yes
- c__low_temp_min_cap_power_rated
- 280 W
- c__t1_min_cap_cooling_cap_rated
- 1750 W
- c__low_temp_full_cap_power_rated
- 1334.44 W
- c__low_temp_half_cap_power_rated
- 400 W
- c__t1_half_cap_cooling_cap_rated
- 2400 W
- c__low_temp_have_half_cap_results
- Yes
- c__low_temp_min_cap_cooling_cap_rated
- 1850 W
- c__low_temp_full_cap_cooling_cap_rated
- 5169.599999999999 W
- c__low_temp_half_cap_cooling_cap_rated
- 2585 W
Australian GEMS registration details
- Registration number
- AAC8354
- GEMS registration id
- 163380
- Status
- approved, available (self-reported)
- Registration expires
- 17 July 2029
- Registered for sale in
- Australia, New Zealand
- Family
- –
- Regulatory standard
- [SEER Non Multi-Split <=65kW] GEMS (Air Conditioners up to 65kW) Determination 2019
- Test standard
- AS/NZS 3823.1.1:2012
- MEPS
- 2019
- Product class
- Class 9
Source: Australian Government Energy Rating (GEMS) registration data, DCCEEW via data.gov.au (CC BY 3.0 AU). Dataset published 19 September 2026; last checked 20 September 2026. How the derived figures are calculated.