New Zealand · costs in NZD
Reverse cycle split system air conditioner, wall hung
LG WH21SLU-23 / WH21SLN-23 Heat Pump
LG WH21SLU-23 / WH21SLN-23 is a 6.1 kW reverse cycle split system heat pump registered for sale in New Zealand under the trans-Tasman E3 energy rating scheme (registration AAC7654).
- Energy rating (cooling)
- 5
- Heating: 2
- Annual electricity use
- 2,741 kWh
- 258 cooling + 2,483 heating
- Estimated running cost
- $905 / year
- $75 / month · $9,045 over 10 years
- Capacity
- 6.1 kW cooling
- 7 kW heating
1% more electricity than the median of 110 comparable 6 kW reverse cycle split system registrations (2,728 kWh a year) in the cold zone. Uses less than 46% of them.
Across all 3,611 air conditioner registrations sold in Australia, it uses less than 66% (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 WH21SLU-23 running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 2,741 | $905 | $9,045 |
| Mixed zone | 1,316 | $434 | $4,343 |
| Hot zone | 1,358 | $448 | $4,481 |
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 6.1 kW, at least 3% lower annual kWh in the cold zone.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Panasonic U-60PZ4R5 / S-6071PU3E6 kW heating6 kW cooling2,078 kWh/yr | 3.5 | $686 | |
| Panasonic U-60PZ3R5 / S-6071PU3E6 kW heating6 kW cooling2,082 kWh/yr | 3.5 | $687 | |
| Daikin RZAV60CV1 / FCTA60AVMA7.1 kW heating6 kW cooling2,191 kWh/yr | 0 | $723 | |
| Hisense HAWK50KR5.4 kW heating5.4 kW cooling2,246 kWh/yr | 3 | $741 | |
| Midea MFEZ60VA-W/MFEZ60VA-N6.5 kW heating6 kW cooling2,417 kWh/yr | 5 | $798 |
Heat pumps similar to the LG WH21SLU-23
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Mitsubishi Electric MUZ-LN60VG2/MSZ-LN60VGDB6.8 kW heating6.1 kW cooling2,652 kWh/yr | 3 | $875 | |
| Mitsubishi Heavy Industries SRC60ZSXA-W / SRK60ZSXA-W6.8 kW heating6.1 kW cooling2,537 kWh/yr | 3.5 | $837 | |
| Comfee CASG-XG60/CASN-XG606.4 kW heating6.1 kW cooling2,645 kWh/yr | 4.5 | $873 | |
| Midea MFXP60W/MFXP60N6.6 kW heating6.1 kW cooling2,718 kWh/yr | 4.5 | $897 | |
| Midea MFEF60VA-W/MFEF60VA-N6.5 kW heating6.1 kW cooling2,794 kWh/yr | 4 | $922 | |
| Mitsubishi Heavy Industries SRC60ZSXA-W/SRK60ZSXA-WF6.8 kW heating6.1 kW cooling2,540 kWh/yr | 3.5 | $838 | |
| Carrier Carrier Ambi6.5 kW heating6.1 kW cooling2,794 kWh/yr | 4 | $922 | |
| Mitsubishi Electric MUZ-LN60VGHZ/MSZ-LN60VGDV6.8 kW heating6.1 kW cooling2,652 kWh/yr | 3 | $875 |
Compare WH21SLU-23 / WH21SLN-23 with another model
LG WH21SLU-23 specifications
- Type
- Reverse cycle
- Configuration
- Split system
- Air distribution
- Non-ducted
- Indoor unit
- Wall hung
- Rated cooling capacity (35 °C)
- 6.10 kW
- Cooling power input
- 1.52 kW
- Rated heating capacity (7 °C)
- 7.00 kW
- Heating power input
- 1.64 kW
- EER, full load (tested)
- 4.13
- COP, full load (tested)
- 4.46
- Rated AEER
- 4.01
- Rated ACOP
- 4.26
- Standby power (PIA)
- 0.7 W
- Compressor
- Variable speed, Inverter
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 65.2 dB(A)
- Outdoor sound power
- 59.2 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 WH21SLU-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 | – | – | 727 | 794 |
| Coldresidential | residential | 5.0 | 2.0 | 258 | 2,483 |
| Mixedcommercial | commercial | – | – | 1,663 | 407 |
| Mixedresidential | residential | 4.5 | 2.5 | 410 | 906 |
| Hotcommercial | commercial | – | – | 2,032 | 82 |
| Hotresidential | residential | 5.0 | 3.0 | 1,227 | 131 |
Part-load test points (23 values)
- c__t1_min_cap_power_rated
- 500 W
- h__h2_ext_cap_power_rated
- 2700 W
- c__t1_half_cap_power_rated
- 565 W
- c__t1_have_min_cap_results
- Yes
- h__h1_half_cap_power_rated
- 720 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
- 3550 W
- h__h2_is_capable_extended_load
- Yes
- c__low_temp_min_cap_power_rated
- 274 W
- c__t1_min_cap_cooling_cap_rated
- 2800 W
- c__low_temp_full_cap_power_rated
- 1389.28 W
- c__low_temp_half_cap_power_rated
- 461 W
- c__t1_half_cap_cooling_cap_rated
- 3050 W
- c__low_temp_have_half_cap_results
- Yes
- c__low_temp_min_cap_cooling_cap_rated
- 1900 W
- c__low_temp_full_cap_cooling_cap_rated
- 6569.7 W
- c__low_temp_half_cap_cooling_cap_rated
- 3285 W
New Zealand E3 registration details
- Registration number
- AAC7654
- GEMS registration id
- 155122
- Status
- approved, available (self-reported)
- Registration expires
- 29 July 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.