Gree 5.1 kW ducted system
$6,500–$10,500
estimated installed price
Cooling
5.1 kW
2.5 stars
Heating
5.7 kW
2.5 stars
Indoor noise
–
dB(A) sound power
Running cost
$410
a year, average zone, at 33c/kWh
Short answer
The Gree 5.1 kW ducted system (GFH18KBXE-S6DNK2D/O / GFH18KBXE-S6DNK2D/I) is a 5.1 kW reverse cycle ducted rated 2.5 stars for cooling and 2.5 stars for heating in the average climate zone. Installed, expect $6,500 to $10,500; the label's figures put running costs near $410 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
- Model numbers
- GFH18KBXE-S6DNK2D/O / GFH18KBXE-S6DNK2D/I
- Type
- Ducted, reverse cycle (heats and cools)
- Cooling capacity
- 5.1 kW
- Cooling power input
- 1.545 kW
- Heating capacity
- 5.7 kW
- Heating power input
- 1.583 kW
- Annual efficiency, cooling (AEER)
- 3.28
- Annual efficiency, heating (ACOP)
- 3.58
- Indoor sound power
- –
- Outdoor sound power
- –
- Refrigerant
- R32
- Power supply
- Single-phase
- Demand response capable
- Yes
- Country of manufacture
- China
- Energy Rating registration
- AAC9853
- Registration valid until
- 2031-02-11
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 | Heating stars | Energy a year | Cost a year |
|---|---|---|---|---|
| HotBrisbane, Darwin | 3 stars | 3 stars | 1,488 kWh 1381 cooling, 107 heating | $491 |
| AverageSydney, Adelaide, Perth | 2.5 stars | 2.5 stars | 1,244 kWh 471 cooling, 773 heating | $410 |
| ColdCanberra, Hobart, Melbourne | 3 stars | 2 stars | 2,426 kWh 300 cooling, 2126 heating | $801 |
How it compares with other Under 10 kW units
- Cooling stars (average zone): 2.5 against a median of 2.5 across 281 Under 10 kW ducted units, better than 26% of them.
- Estimated installed price for this size: $6,500 to $10,500. Brand and install difficulty move it within that band.
See the quietest and most efficient rankings.
Alternatives at Under 10 kW from other brands
ActronAir Aspire 7.3 kW ducted system
LRC-071DS / LRE-071DS
4 stars cooling · – dB(A)
Carrier 7.3 kW ducted system
38QSP070N8/42QSP070N8
4 stars cooling · – dB(A)
Kaden 7.3 kW ducted system
KDI-7.0
4 stars cooling · – dB(A)
Kaden 7.3 kW ducted system
KDI24 / KDI24
4 stars cooling · – dB(A)
Midea 7.3 kW ducted system
UCMI70OC/DUCMI70IC
4 stars cooling · – dB(A)
Rinnai Ducted 7.3 kW ducted system
DONSR07B1LA/DINLR07B1A
4 stars cooling · – dB(A)
FAQ
Gree GFH18KBXE-S6DNK2D/O / GFH18KBXE-S6DNK2D/I: common questions
How much does the Gree 5.1 kW ducted system cost installed?
Typically $6,500 to $10,500 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 5.1 kW ducted system cost to run?
Using the energy label's annual figures at 33c/kWh: about $491 a year in a hot zone, $410 in an average zone and $801 in a cold zone. The label assumes typical use; yours will differ with hours, set temperature and insulation.
Where is the Gree GFH18KBXE-S6DNK2D/O / GFH18KBXE-S6DNK2D/I made?
The Energy Rating register lists the country of manufacture as China.
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