Gree Alto 2.7 kW split system
$1,500–$2,500
estimated installed price
Cooling
2.7 kW
3 stars
Heating
None
Cooling only
Indoor noise
54.9
dB(A) sound power, quieter than 62% of its size
Running cost
$77
a year, average zone, at 33c/kWh
Short answer
The Gree Alto 2.7 kW split system (GWC09ATBXB-K6DNA1C/O / GWC09ATBXB-K6DNA1C/I) is a 2.7 kW cooling-only wall split rated 3 stars for cooling in the average climate zone. Installed, expect $1,500 to $2,500; the label's figures put running costs near $77 a year in an average-zone home.
Prices are estimates, not quotes (how we estimate them). Rebate rules checked September 2026.
Compare 3 quotes for my houseFull specifications
- Brand
- Gree
- Series
- Gree Alto
- Model numbers
- GWC09ATBXB-K6DNA1C/O / GWC09ATBXB-K6DNA1C/I
- Type
- Wall split, cooling only
- Cooling capacity
- 2.7 kW
- Cooling power input
- 0.714 kW
- Annual efficiency, cooling (AEER)
- 3.75
- Indoor sound power
- 54.9 dB(A)
- Outdoor sound power
- 60.6 dB(A)
- Refrigerant
- R32
- Power supply
- Single-phase
- Demand response capable
- Yes
- Country of manufacture
- China
- Energy Rating registration
- AAC7769
- Registration valid until
- 2028-09-11
Star ratings and running cost by climate
The Zoned Energy Rating Label rates each unit for three climates. Annual energy is the label's estimate for typical use in that zone; the cost applies 33c/kWh, around the 2026–27 default electricity offer. Use the running cost calculator for your own hours and tariff.
| Climate zone | Cooling stars | Energy a year | Cost a year |
|---|---|---|---|
| HotBrisbane, Darwin | 3.5 stars | 673 kWh | $222 |
| AverageSydney, Adelaide, Perth | 3 stars | 232 kWh | $77 |
| ColdCanberra, Hobart, Melbourne | 3 stars | 149 kWh | $49 |
How it compares with other 2.5 kW units
- Cooling stars (average zone): 3 against a median of 3.5 across 21 2.5 kW wall split units, better than 5% of them.
- Indoor sound power: 54.9 dB(A) against a median of 56 dB(A), quieter than 62%.
- Estimated installed price for this size: $1,500 to $2,500. Brand and install difficulty move it within that band.
See the quietest and most efficient rankings.
Other sizes in the Gree Alto range
Alternatives at 2.5 kW from other brands
Rinnai CJ Cooling Only 2.6 kW split system
HONCJ26B1 / HINCJ26B1
7 stars cooling · 54.3 dB(A)
Hitachi airHome 500 Cooling Only 2.5 kW split system
RAC-DJ25PCAT/RAK-DJ25PCAT
5.5 stars cooling · 54 dB(A)
Daikin 2.5 kW split system
RKM25QVMA / FTKM25QVMA
5.5 stars cooling · 56 dB(A)
Daikin 2.5 kW split system
RKM25YVMA / FTKM25YVMA
5.5 stars cooling · 57 dB(A)
Mitsubishi Heavy Industries 2.5 kW split system
SRC10YTA-W/SRK10YTA-WF
5 stars cooling · 50 dB(A)
Daikin 2.5 kW split system
RKM25Q2VMA / FTKM25Q2VMA
5 stars cooling · 58 dB(A)
FAQ
Gree GWC09ATBXB-K6DNA1C/O / GWC09ATBXB-K6DNA1C/I: common questions
How much does the Gree Alto 2.7 kW split system cost installed?
Typically $1,500 to $2,500 supplied and installed in 2026 for a standard job at this size. Longer pipe runs, a new circuit, a second storey or removing an old unit add to it. Get up to three local quotes for your actual install.
How much does the Gree Alto 2.7 kW split system cost to run?
Using the energy label's annual figures at 33c/kWh: about $222 a year in a hot zone, $77 in an average zone and $49 in a cold zone. The label assumes typical use; yours will differ with hours, set temperature and insulation.
Where is the Gree GWC09ATBXB-K6DNA1C/O / GWC09ATBXB-K6DNA1C/I made?
The Energy Rating register lists the country of manufacture as China.
Is the Gree Alto 2.7 kW split system quiet?
Its registered indoor sound power is 54.9 dB(A), against a median of 56 dB(A) for 2.5 kW wall split units, so it's quieter than about 62% of them. Brochures quote a lower sound pressure figure on the lowest fan speed; the register measures every model the same way.
Sources
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