New Zealand · costs in NZD
Reverse cycle split system air conditioner, wall hung
LG WH18SLU-23 / WH18SLN-23 Heat Pump
LG WH18SLU-23 / WH18SLN-23 is a 5 kW reverse cycle split system heat pump registered for sale in New Zealand under the trans-Tasman E3 energy rating scheme (registration AAC7751).
- Energy rating (cooling)
- 5
- Heating: 2.5
- Annual electricity use
- 2,144 kWh
- 214 cooling + 1,930 heating
- Estimated running cost
- $708 / year
- $59 / month · $7,075 over 10 years
- Capacity
- 5 kW cooling
- 6 kW heating
About the same electricity as the median of 236 comparable 5 kW reverse cycle split system registrations (2,154 kWh a year) in the cold zone. Uses less than 52% of them.
Across all 3,611 air conditioner registrations sold in Australia, it uses less than 74% (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 cold zone (Canberra climate: Canberra, Hobart, Ballarat, alpine areas). All of New Zealand is the cold zone on the Zoned Energy Rating Label. Cost = kWh × 33c/kWh in NZD; change the price above to your tariff.
LG WH18SLU-23 running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 2,144 | $708 | $7,075 |
| Mixed zone | 1,064 | $351 | $3,511 |
| Hot zone | 1,113 | $367 | $3,673 |
At 33c/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.
Heat pumps that use less electricity
Same configuration and type, cooling capacity within 12% of 5 kW, at least 3% lower annual kWh in the cold zone.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Daikin RXM46AVMA / FTXM46AVMA4.7 kW heating4.6 kW cooling1,543 kWh/yr | 4.5 | $509 | |
| Daikin RXM46WVMA / FTXM46WVMA4.7 kW heating4.6 kW cooling1,571 kWh/yr | 4.5 | $518 | |
| Gree GWH15AGDXD-K6DNA1A/O / GWH15AGDXD-K6DNA1A/I4.7 kW heating4.6 kW cooling1,835 kWh/yr | 4 | $606 | |
| Gree GWH15QDXE4.7 kW heating4.6 kW cooling1,839 kWh/yr | 3 | $607 | |
| Midea MFCA50VA-W/MFCA50VA-N5.2 kW heating5.2 kW cooling1,841 kWh/yr | 4.5 | $608 |
Heat pumps similar to the LG WH18SLU-23
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Hisense HAWG18KR5.3 kW heating5 kW cooling1,993 kWh/yr | 4 | $658 | |
| Pioneer International HPR-18A25.1 kW heating5 kW cooling1,968 kWh/yr | 4 | $649 | |
| Kaden KS185.1 kW heating5 kW cooling2,008 kWh/yr | 3.5 | $663 | |
| Panasonic CU-HZ50DKR / CS-HZ50DKR6 kW heating5 kW cooling1,940 kWh/yr | 5.5 | $640 | |
| Actron Air WRC-050CS / WRE-050CS5 kW heating5 kW cooling1,936 kWh/yr | 5 | $639 | |
| Daikin RXM50AVMA / FTXM50AVMA6 kW heating5 kW cooling1,881 kWh/yr | 5.5 | $621 | |
| Daikin RXM50WVMA / FTXM50WVMA6 kW heating5 kW cooling1,903 kWh/yr | 5 | $628 | |
| Haier 1U50PFHRA / AS50PFHRA5.3 kW heating5 kW cooling1,973 kWh/yr | 4 | $651 |
Compare WH18SLU-23 / WH18SLN-23 with another model
LG WH18SLU-23 specifications
- Type
- Reverse cycle
- Configuration
- Split system
- Air distribution
- Non-ducted
- Indoor unit
- Wall hung
- Rated cooling capacity (35 °C)
- 5.00 kW
- Cooling power input
- 1.14 kW
- Rated heating capacity (7 °C)
- 6.00 kW
- Heating power input
- 1.31 kW
- EER, full load (tested)
- 4.59
- COP, full load (tested)
- 4.61
- Rated AEER
- 4.38
- Rated ACOP
- 4.57
- Standby power (PIA)
- 0.8 W
- Compressor
- Variable speed, Inverter
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 65.1 dB(A)
- Outdoor sound power
- 58.3 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 WH18SLU-23 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 | – | – | 313 | 627 |
| Coldresidential | residential | 5.0 | 2.5 | 214 | 1,930 |
| Mixedcommercial | commercial | – | – | 491 | 329 |
| Mixedresidential | residential | 4.5 | 3.0 | 338 | 726 |
| Hotcommercial | commercial | – | – | 1,248 | 67 |
| Hotresidential | residential | 5.0 | 3.0 | 1,006 | 107 |
Part-load test points (23 values)
- c__t1_min_cap_power_rated
- 420 W
- h__h2_ext_cap_power_rated
- 2700 W
- c__t1_half_cap_power_rated
- 460 W
- c__t1_have_min_cap_results
- Yes
- h__h1_half_cap_power_rated
- 578 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
- 6650 W
- h__h1_half_cap_heat_cap_rated
- 3000 W
- h__h2_is_capable_extended_load
- Yes
- c__low_temp_min_cap_power_rated
- 274 W
- c__t1_min_cap_cooling_cap_rated
- 2300 W
- c__low_temp_full_cap_power_rated
- 1041.96 W
- c__low_temp_half_cap_power_rated
- 378 W
- c__t1_half_cap_cooling_cap_rated
- 2500 W
- c__low_temp_have_half_cap_results
- Yes
- c__low_temp_min_cap_cooling_cap_rated
- 2000 W
- c__low_temp_full_cap_cooling_cap_rated
- 5385 W
- c__low_temp_half_cap_cooling_cap_rated
- 2740 W
New Zealand E3 registration details
- Registration number
- AAC7751
- GEMS registration id
- 155895
- Status
- approved, available (self-reported)
- Registration expires
- 28 August 2028
- 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: E3 programme registration data (EECA, New Zealand) (trans-Tasman E3 registration data published by DCCEEW on data.gov.au, CC BY 3.0 AU). Dataset published 19 September 2026; last checked 20 September 2026. How the derived figures are calculated.