New Zealand · costs in NZD
Reverse cycle split system air conditioner, wall hung
Westinghouse WSD91HWB-I/WSD91HWA-E Heat Pump
Westinghouse WSD91HWB-I/WSD91HWA-E is a 9.1 kW reverse cycle split system heat pump registered for sale in New Zealand under the trans-Tasman E3 energy rating scheme (registration AAC7558).
- Energy rating (cooling)
- 4.5
- Heating: 1.5
- Annual electricity use
- 4,785 kWh
- 420 cooling + 4,365 heating
- Estimated running cost
- $1,579 / year
- $132 / month · $15,791 over 10 years
- Capacity
- 9.1 kW cooling
- 10.4 kW heating
8% more electricity than the median of 127 comparable 10 kW reverse cycle split system registrations (4,446 kWh a year) in the cold zone. Uses less than 32% of them.
Across all 3,611 air conditioner registrations sold in Australia, it uses less than 40% (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 WSD91HWB-I running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 4,785 | $1,579 | $15,791 |
| Mixed zone | 2,164 | $714 | $7,141 |
| Hot zone | 2,171 | $716 | $7,164 |
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 9.1 kW, at least 3% lower annual kWh in the cold zone.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Daikin RZAC100C2Y1 / FCA100CVMA11.2 kW heating10 kW cooling1,073 kWh/yr | 2.5 | $354 | |
| Panasonic U-100PZ4R8 / S-1014PU3E10 kW heating10 kW cooling3,376 kWh/yr | 3.5 | $1,114 | |
| Panasonic U-100PZ3R5 / S-1014PU3E10 kW heating10 kW cooling3,376 kWh/yr | 3.5 | $1,114 | |
| TCL TAC-28CHSD/TPH11IT8.5 kW heating8.2 kW cooling3,401 kWh/yr | 3.5 | $1,122 | |
| Braemar TCHV80T1S/TSHV80T1S8.5 kW heating8.2 kW cooling3,401 kWh/yr | 3.5 | $1,122 |
Heat pumps similar to the Westinghouse WSD91HWB-I
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Carrier 38QHB090N8-1/42QHB090N8-110.1 kW heating9.1 kW cooling4,554 kWh/yr | 4 | $1,503 | |
| Kogan KASSSAC90HE9.5 kW heating9 kW cooling3,668 kWh/yr | 3.5 | $1,210 | |
| Panasonic U-100PZ3R5/S-100PK3R9 kW heating9 kW cooling3,534 kWh/yr | 2.5 | $1,166 | |
| Kogan KASSSAC90HD9.5 kW heating9 kW cooling3,668 kWh/yr | 3.5 | $1,210 | |
| Midea MFAB-90WD/MFAB-90ND9.5 kW heating9 kW cooling3,874 kWh/yr | 4 | $1,278 | |
| Midea MFAG90VB-W/MFAG90VB-N9.5 kW heating9 kW cooling3,874 kWh/yr | 4 | $1,278 | |
| Carrier 38QAF090N8/42QAF090N89.5 kW heating9 kW cooling3,874 kWh/yr | 4 | $1,278 | |
| Panasonic U-100PZ3R8/S-100PK3R9 kW heating9 kW cooling3,534 kWh/yr | 2.5 | $1,166 |
Compare WSD91HWB-I/WSD91HWA-E with another model
Westinghouse WSD91HWB-I specifications
- Type
- Reverse cycle
- Configuration
- Split system
- Air distribution
- Non-ducted
- Indoor unit
- Wall hung
- Rated cooling capacity (35 °C)
- 9.10 kW
- Cooling power input
- 2.38 kW
- Rated heating capacity (7 °C)
- 10.40 kW
- Heating power input
- 3.07 kW
- EER, full load (tested)
- 3.79
- COP, full load (tested)
- 3.43
- Rated AEER
- 3.82
- Rated ACOP
- 3.38
- Standby power (PIA)
- 1.3 W
- Compressor
- Variable speed, Inverter
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 61.7 dB(A)
- Outdoor sound power
- 68.5 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 WSD91HWB-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 | – | – | 342 | 1,316 |
| Coldresidential | residential | 4.5 | 1.5 | 420 | 4,365 |
| Mixedcommercial | commercial | – | – | 679 | 614 |
| Mixedresidential | residential | 4.0 | 2.0 | 658 | 1,506 |
| Hotcommercial | commercial | – | – | 1,068 | 116 |
| Hotresidential | residential | 4.5 | 3.0 | 1,984 | 187 |
Part-load test points (23 values)
- c__t1_min_cap_power_rated
- 830 W
- h__h1_min_cap_power_rated
- 537 W
- h__h2_ext_cap_power_rated
- 3147 W
- c__t1_half_cap_power_rated
- 1060 W
- c__t1_have_min_cap_results
- Yes
- h__h1_half_cap_power_rated
- 1086 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
- 2700 W
- h__h2_ext_cap_heat_cap_rated
- 7600 W
- h__h1_half_cap_heat_cap_rated
- 5100 W
- h__h2_is_capable_extended_load
- Yes
- c__low_temp_min_cap_power_rated
- 439 W
- c__t1_min_cap_cooling_cap_rated
- 3240 W
- c__low_temp_half_cap_power_rated
- 745 W
- c__t1_half_cap_cooling_cap_rated
- 4500 W
- c__low_temp_have_half_cap_results
- Yes
- c__low_temp_min_cap_cooling_cap_rated
- 3100 W
- c__low_temp_half_cap_cooling_cap_rated
- 4550 W
Other model numbers on registration AAC7558
Registered together and sharing the same test results. Usually variants of the same unit.
New Zealand E3 registration details
- Registration number
- AAC7558
- GEMS registration id
- 154750
- Status
- approved, available (self-reported)
- Registration expires
- 7 June 2028
- Registered for sale in
- Australia, New Zealand
- Family
- WSD91HWA-E/WSD91HWA-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.