New Zealand · costs in NZD
Reverse cycle split system air conditioner, wall hung
Westinghouse WSD51HWB-I/WSD51HWA-E Heat Pump
Westinghouse WSD51HWB-I/WSD51HWA-E is a 5.1 kW reverse cycle split system heat pump registered for sale in New Zealand under the trans-Tasman E3 energy rating scheme (registration AAC7553).
- Energy rating (cooling)
- 4.5
- Heating: 2.5
- Annual electricity use
- 2,062 kWh
- 230 cooling + 1,832 heating
- Estimated running cost
- $680 / year
- $57 / month · $6,805 over 10 years
- Capacity
- 5.1 kW cooling
- 6.1 kW heating
4% less electricity than the median of 236 comparable 5 kW reverse cycle split system registrations (2,154 kWh a year) in the cold zone. Uses less than 72% of them.
Across all 3,611 air conditioner registrations sold in Australia, it uses less than 76% (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.
Westinghouse WSD51HWB-I running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 2,062 | $680 | $6,805 |
| Mixed zone | 1,035 | $342 | $3,416 |
| Hot zone | 1,154 | $381 | $3,808 |
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 5.1 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 GWH15QDXE-K6DNA1A/O / GWH15QDXE-K6DNA1A/I4.7 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 Westinghouse WSD51HWB-I
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Hisense HAW*18KR5.8 kW heating5.1 kW cooling2,162 kWh/yr | 5 | $713 | |
| Hisense HAWU18KR5.8 kW heating5.1 kW cooling2,162 kWh/yr | 5 | $713 | |
| Midea MFEP50VB-W/MFEP50VB-N6 kW heating5 kW cooling2,147 kWh/yr | 5.5 | $709 | |
| Actron Air WRC-050DS / WRE-050DS6 kW heating5 kW cooling2,147 kWh/yr | 5.5 | $709 | |
| Solar Acdc DGWA1-ACDC-18KR25 kW heating5 kW cooling1,905 kWh/yr | 3.5 | $629 | |
| Midea MFCA50VA-W/MFCA50VA-N5.2 kW heating5.2 kW cooling1,841 kWh/yr | 4.5 | $608 | |
| Daikin RXM50WVMA / FTXM50WVMA6 kW heating5 kW cooling1,903 kWh/yr | 5 | $628 | |
| Daikin RXM50AVMA / FTXM50AVMA6 kW heating5 kW cooling1,881 kWh/yr | 5.5 | $621 |
Compare WSD51HWB-I/WSD51HWA-E with another model
Westinghouse WSD51HWB-I specifications
- Type
- Reverse cycle
- Configuration
- Split system
- Air distribution
- Non-ducted
- Indoor unit
- Wall hung
- Rated cooling capacity (35 °C)
- 5.10 kW
- Cooling power input
- 1.18 kW
- Rated heating capacity (7 °C)
- 6.10 kW
- Heating power input
- 1.30 kW
- EER, full load (tested)
- 4.42
- COP, full load (tested)
- 4.68
- Rated AEER
- 4.31
- Rated ACOP
- 4.68
- Standby power (PIA)
- 1.2 W
- Compressor
- Variable speed, Inverter
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 63.7 dB(A)
- Outdoor sound power
- 67.3 dB(A)
- Demand response (AS/NZS 4755)
- Yes
- Country of manufacture
- China
Dimensions are not collected for registrations under the 2019 Determination, so they are shown only where the source has them.
Westinghouse WSD51HWB-I 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 | – | – | 393 | 580 |
| Coldresidential | residential | 4.5 | 2.5 | 230 | 1,832 |
| Mixedcommercial | commercial | – | – | 552 | 299 |
| Mixedresidential | residential | 4.0 | 3.0 | 362 | 673 |
| Hotcommercial | commercial | – | – | 1,314 | 61 |
| Hotresidential | residential | 4.5 | 4.0 | 1,058 | 96 |
Part-load test points (23 values)
- c__t1_min_cap_power_rated
- 431 W
- h__h1_min_cap_power_rated
- 360 W
- h__h2_ext_cap_power_rated
- 1800 W
- c__t1_half_cap_power_rated
- 540 W
- c__t1_have_min_cap_results
- Yes
- h__h1_half_cap_power_rated
- 535 W
- h__h1_have_min_cap_results
- Yes
- 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__h1_min_cap_heat_cap_rated
- 2041 W
- h__h2_ext_cap_heat_cap_rated
- 5800 W
- h__h1_half_cap_heat_cap_rated
- 3085 W
- h__h2_is_capable_extended_load
- Yes
- c__low_temp_min_cap_power_rated
- 325 W
- c__t1_min_cap_cooling_cap_rated
- 1800 W
- c__low_temp_half_cap_power_rated
- 405 W
- c__t1_half_cap_cooling_cap_rated
- 2460 W
- c__low_temp_have_half_cap_results
- Yes
- c__low_temp_min_cap_cooling_cap_rated
- 2200 W
- c__low_temp_half_cap_cooling_cap_rated
- 2780 W
Other model numbers on registration AAC7553
Registered together and sharing the same test results. Usually variants of the same unit.
New Zealand E3 registration details
- Registration number
- AAC7553
- GEMS registration id
- 154739
- Status
- approved, available (self-reported)
- Registration expires
- 5 June 2028
- Registered for sale in
- Australia, New Zealand
- Family
- WSD51HWA-E/WSD51HWA-I
- 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 25 September 2026; last checked 26 September 2026. How the derived figures are calculated.