Name: Mitsubishi Heavy Industries SRC42ZTA-WB/SRK42ZTA-WFB
Brand: Mitsubishi Heavy Industries
SKU: AAC10042

Climate zone

Electricity pricec/kWh

Energy rating (cooling): 4.5; Heating: 2.5
Annual electricity use: 1,950 kWh; 184 cooling + 1,766 heating
Estimated running cost: $644 / year; $54 / month · $6,435 over 10 years
Capacity: 4.2 kW cooling; 5.4 kW heating

40% more electricity than the median of 187 comparable 3.5 kW reverse cycle split system registrations (1,395 kWh a year) in the cold zone. Uses less than 7% of them.

Across all 3,611 air conditioner registrations sold in Australia, it uses less than 77% (this compares very different sizes, so the cohort figure above is the useful one).

coolingheatingClick a zone to use it across the page.

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.

Mitsubishi Heavy Industries SRC42ZTA-WB running cost by climate zone

Climate zone	kWh / year	Per month	Per year	5 years	10 years
Cold zone (Canberra, Hobart, Ballarat, alpine areas)	1,950	$54	$644	$3,218	$6,435
Mixed zone (Sydney, Melbourne, Adelaide, Perth)	932	$26	$308	$1,538	$3,076
Hot zone (Brisbane, Darwin, Cairns, Townsville)	951	$26	$314	$1,569	$3,138

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 4.2 kW, at least 3% lower annual kWh in the cold zone.

Model	Cooling	Heating	Stars	kWh / yr	Est. cost / yr	Uses less than
Hisense HAWU12KR3.9 kW heating3.7 kW cooling1,332 kWh/yr	3.7 kW	3.9 kW	6	1,332	$440	66% of similar
Hisense HAWH12KR3.9 kW heating3.7 kW cooling1,360 kWh/yr	3.7 kW	3.9 kW	5	1,360	$449	62% of similar
Daikin RXM46AVMA / FTXM46AVMA4.7 kW heating4.6 kW cooling1,543 kWh/yr	4.6 kW	4.7 kW	4.5	1,543	$509	100% of similar
Daikin RXM46WVMA / FTXM46WVMA4.7 kW heating4.6 kW cooling1,571 kWh/yr	4.6 kW	4.7 kW	4.5	1,571	$518	99% of similar
Toshiba RAS-13U2AVSG-NZ / RAS-13U2FVG-NZ4.2 kW heating4 kW cooling1,756 kWh/yr	4 kW	4.2 kW	4	1,756	$579	10% of similar

Heat pumps similar to the Mitsubishi Heavy Industries SRC42ZTA-WB

Technically comparable registrations: same configuration and type, capacity within 12%.

Model	Cooling	Heating	Stars	kWh / yr	Est. cost / yr	Uses less than
Panasonic CU-Z42DKR / CS-Z42DKRW5 kW heating4.2 kW cooling1,969 kWh/yr	4.2 kW	5 kW	3.5	1,969	$650	6% of similar
Mitsubishi Electric MUZ-AP42VGD2/MSZ-AP42VGD25.4 kW heating4.2 kW cooling2,017 kWh/yr	4.2 kW	5.4 kW	4	2,017	$666	5% of similar
Toshiba RAS-16E2AVG-A/RAS-16E2KV2G-A5.4 kW heating4.2 kW cooling2,324 kWh/yr	4.2 kW	5.4 kW	3	2,324	$767	1% of similar
Fujitsu AOTH14KNCA/ASTH14KNCA4.7 kW heating4.2 kW cooling1,822 kWh/yr	4.2 kW	4.7 kW	4	1,822	$601	9% of similar
Mitsubishi Electric MUZ-AP42VG2/MSZ-AP42VGKD25.4 kW heating4.2 kW cooling2,017 kWh/yr	4.2 kW	5.4 kW	4	2,017	$666	5% of similar
Panasonic CU-Z42DKR / CS-Z42DKRW5 kW heating4.2 kW cooling1,969 kWh/yr	4.2 kW	5 kW	3.5	1,969	$650	6% of similar
Toshiba RAS-16ZAVSG-A / RAS-16ZKVSG-A5.4 kW heating4.2 kW cooling2,099 kWh/yr	4.2 kW	5.4 kW	4	2,099	$693	5% of similar
Fujitsu AOTG14KVCA/AGTG14KVCA5.2 kW heating4.2 kW cooling2,113 kWh/yr	4.2 kW	5.2 kW	4	2,113	$697	4% of similar

Compare SRC42ZTA-WB/SRK42ZTA-WFB with another model

Mitsubishi Heavy Industries SRC42ZTA-WB specifications

Type: Reverse cycle
Configuration: Split system
Air distribution: Non-ducted
Indoor unit: Wall hung
Rated cooling capacity (35 °C): 4.20 kW
Cooling power input: 1.03 kW
Rated heating capacity (7 °C): 5.40 kW
Heating power input: 1.33 kW
EER, full load (tested): 4.14
COP, full load (tested): 4.09
Rated AEER: 4.05
Rated ACOP: 4.04
Standby power (PIA): 1.9 W
Compressor: Variable speed, Inverter
Refrigerant: R32
Power supply: Single phase
Indoor sound power: 59 dB(A)
Outdoor sound power: 61 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.

Mitsubishi Heavy Industries SRC42ZTA-WB 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	TCSPF	HSPF
Coldcommercial	commercial	–	–	357	550	8.51	4.36
Coldresidential	residential	4.5	2.5	184	1,766	6.27	4.00
Mixedcommercial	commercial	–	–	477	279	7.52	4.92
Mixedresidential	residential	4.0	3.0	295	637	5.90	4.64
Hotcommercial	commercial	–	–	1,106	57	7.10	5.33
Hotresidential	residential	4.5	3.5	861	90	6.36	5.31

Part-load test points (18 values)

h__h2_ext_cap_power_rated: 1490 W
c__t1_half_cap_power_rated: 345 W
c__t1_have_min_cap_results: No
h__h1_half_cap_power_rated: 465 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: 4700 W
h__h1_half_cap_heat_cap_rated: 2700 W
h__h2_is_capable_extended_load: Yes
c__low_temp_half_cap_power_rated: 285 W
c__low_temp_have_min_cap_results: No
c__t1_half_cap_cooling_cap_rated: 2100 W
c__low_temp_have_half_cap_results: Yes
c__low_temp_half_cap_cooling_cap_rated: 2260 W

Other model numbers on registration AAC10042

Registered together and sharing the same test results. Usually variants of the same unit.

New Zealand E3 registration details

Registration number: AAC10042
GEMS registration id: 177936
Status: approved, available (self-reported)
Registration expires: 7 April 2031
Registered for sale in: Australia, New Zealand
Family: SRC42ZTA-W* / SRK42ZTA-WF*
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. Manufacturer: mhiaa.com.au. How the derived figures are calculated.