Australia · costs in AUD
Reverse cycle window / wall air conditioner
Domain WAM-42B Air Conditioner
Domain WAM-42B is a 4.2 kW reverse cycle window / wall air conditioner registered under Australia’s Energy Rating (GEMS) scheme (registration AAC8327).
- Energy rating (cooling)
- 1.5
- Heating: 1
- Annual electricity use
- 1,246 kWh
- 512 cooling + 734 heating
- Estimated running cost
- $399 / year
- $33 / month · $3,987 over 10 years
- Capacity
- 4.2 kW cooling
- 3.6 kW heating
About the same electricity as the median of 16 comparable 3.5 kW reverse cycle window / wall registrations (1,243 kWh a year) in the mixed zone. Uses less than 25% of them.
Across all 3,680 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.
Domain WAM-42B running cost by climate zone
| Climate zone | kWh / year | Per year | 10 years |
|---|---|---|---|
| Cold zone | 2,214 | $708 | $7,085 |
| Mixed zone | 1,246 | $399 | $3,987 |
| Hot zone | 1,617 | $517 | $5,174 |
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 similar to the Domain WAM-42B
Technically comparable registrations: same configuration and type, capacity within 12%.
| Model | Stars | Est. cost / yr | Compare |
|---|---|---|---|
| Kogan KAWDACR41TB3.6 kW heating4.2 kW cooling1,246 kWh/yr | 1.5 | $399 | |
| Bonaire CRC60000423.6 kW heating4.2 kW cooling1,246 kWh/yr | 1.5 | $399 | |
| Dimplex DCB143.6 kW heating4.2 kW cooling1,246 kWh/yr | 1.5 | $399 | |
| Kogan KAWDACR41TD3.6 kW heating4.2 kW cooling1,246 kWh/yr | 1.5 | $399 | |
| Heller HWA13R3.6 kW heating4.1 kW cooling1,235 kWh/yr | 1.5 | $395 | |
| TECO TWW40HFWDG3.6 kW heating3.9 kW cooling1,267 kWh/yr | 1.5 | $405 | |
| Midea MWFF39H3.5 kW heating3.9 kW cooling1,230 kWh/yr | 2 | $394 | |
| Westinghouse WWH39HWC3.5 kW heating3.9 kW cooling1,230 kWh/yr | 2 | $394 |
Compare WAM-42B with another model
Domain WAM-42B specifications
- Type
- Reverse cycle
- Configuration
- Window / wall
- Air distribution
- Non-ducted
- Indoor unit
- –
- Rated cooling capacity (35 °C)
- 4.20 kW
- Cooling power input
- 1.28 kW
- Rated heating capacity (7 °C)
- 3.60 kW
- Heating power input
- 1.07 kW
- EER, full load (tested)
- 3.26
- COP, full load (tested)
- 3.22
- Rated AEER
- 3.27
- Rated ACOP
- 3.35
- Standby power (PIA)
- 1.7 W
- Compressor
- Fixed speed
- Refrigerant
- R32
- Power supply
- Single phase
- Indoor sound power
- 57.8 dB(A)
- Outdoor sound power
- 63.8 dB(A)
- Demand response (AS/NZS 4755)
- No
- Country of manufacture
- China
Dimensions are not collected for registrations under the 2019 Determination, so they are shown only where the source has them.
Domain WAM-42B 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 | – | – | 740 | 614 |
| Coldresidential | residential | 1.5 | 1.0 | 336 | 1,878 |
| Mixedcommercial | commercial | – | – | 930 | 327 |
| Mixedresidential | residential | 1.5 | 1.0 | 512 | 734 |
| Hotcommercial | commercial | – | – | 2,041 | 69 |
| Hotresidential | residential | 2.0 | 1.0 | 1,506 | 111 |
Part-load test points (6 values)
- h__h2_full_cap_power_rated
- 970 W
- h__h3_have_full_cap_results
- No
- h__h2_full_cap_heat_cap_rated
- 2620 W
- c__low_temp_full_cap_power_rated
- 1140 W
- c__low_temp_have_full_cap_results
- Yes
- c__low_temp_full_cap_cooling_cap_rated
- 4700 W
Australian GEMS registration details
- Registration number
- AAC8327
- GEMS registration id
- 163004
- Status
- approved, available (self-reported)
- Registration expires
- 2 July 2029
- Registered for sale in
- Australia
- 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 5
Source: Australian Government Energy Rating (GEMS) registration data, DCCEEW via data.gov.au (CC BY 3.0 AU). Dataset published 25 September 2026; last checked 26 September 2026. How the derived figures are calculated.