Air conditioning
in South Hedland
A 30 square metre living room in South Hedland needs about 5.38kW, against 4.13kW for the same room in Australind, because South Hedland peaks at 42.5°C where Australind hits 35.1°C. Installed prices here run $1,400–$3,600 for splits.
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Why South Hedland is different
Sizing advice written for "Perth" is written for an average that barely exists. South Hedland accumulates 1395.7 cooling degree days a year and clears 35°C about 153 days. Australind, across Perth, accumulates 74.9 and clears 35°C about 11.4 days — roughly 19 times the cooling demand. That is why the same room needs a different size unit depending which suburb it sits in, and why a number quoted for the metro average will be wrong for most addresses in it.
What size you need in South Hedland
| Room | Approx size | Cooling needed | Unit to look for |
|---|---|---|---|
| Bedroom | 12m² | 2.15kW | 2kW |
| Large bedroom or study | 18m² | 3.23kW | 3.5kW |
| Small living area | 25m² | 4.48kW | 4.2kW |
| Living room | 30m² | 5.38kW | 5kW |
| Open-plan living and dining | 45m² | 8.07kW | 8kW |
| Large open plan | 60m² | 10.76kW | 10kW |
Sizing follows the design criterion AIRAH uses in its FairAir calculator: the 3pm outdoor temperature exceeded on no more than 10 days a year. We compute that figure for each suburb from Bureau of Meteorology daily records, then split the cooling load into a component that scales with how far the design temperature sits above 24C and a component from sun and internal heat that barely varies by location. That 50/50 split is our assumption, not AIRAH's. Treat the result as a starting point for a quote, not a substitute for an installer measuring your rooms.
What it costs to run here
South Hedland sits in the Horizon Power network area, where a residential flat rate currently runs about 33.2621c per kilowatt hour (Horizon Power A2 Residential Tariff). On that rate, a typical 3.5kW split system used normally costs roughly $576 a year in cooling, against about $53 for the identical unit in Australind.
That figure comes from the energy rating scheme's own registered consumption figures, measured across three Australian reference climates and fitted to South Hedland's 1395.7 cooling degree days: about 111.4 kilowatt hours a year regardless of climate, plus 1.16 per degree day, then charged at the local tariff. The fixed part matters, because a running air conditioner draws power for standby and part-load cycling even where there is barely any cooling to do — which is why the mildest suburbs still cost something rather than nothing.
What changes a quote in South Hedland
Sizing for 42.5°C, not for the average
South Hedland reaches 42.5°C on its hottest days and clears 35°C about 153 days a year. Every system loses output as the outdoor temperature climbs, so a unit specified against the nominal rating will disappoint exactly when you need it. Ask what the unit actually delivers at 40°C rather than at its test conditions.
Humidity, not just heat
South Hedland runs a January afternoon dew point around 22°C, which means the machine spends much of its work removing moisture rather than dropping temperature. A slightly larger unit run gently dehumidifies far better than a small one at full tilt, and comfort here depends on that more than on the thermostat reading.
Newer housing, simpler installs
A median age of 32 alongside 71.5% detached housing points to a suburb built relatively recently. That usually means modern switchboards with capacity to spare, accessible roof cavities and straightforward pipe routes, all of which keep labour down. It is one reason quotes in South Hedland tend to cluster more tightly than in older areas.
Installed prices
| System | Installed price | Suits |
|---|---|---|
| Small split (2.5kW) | $1,400–$2,250 | Bedrooms and studies |
| Large split (5-7kW) | $2,350–$3,600 | Living areas |
| Ducted, whole home | $9,000–$15,000 | Houses with roof access |
Perth pricing. See the full Perth cost guide for a breakdown by job, or the Western Australia rebate guide for discounts that come off these figures.
About South Hedland
Around 12,148 people live in South Hedland (estimated for 2025), across roughly 3,445 occupied dwellings. The housing mix is 5.9% apartments, 71.5% separate houses and 20.9% semi-detached or townhouses, which is what drives most of the practical differences in getting a system installed here.
Nearby suburbs
Climate, network tariffs and housing stock shift across a metro, so the sizing and running costs on these pages differ from South Hedland's.
- Air conditioning in Yanchep 1273.4km
- Air conditioning in Alkimos 1279.4km
- Air conditioning in Butler 1282.3km
- Air conditioning in Quinns Rocks 1285.1km
Sources and data
- ABS Census 2021, dwelling structure and medians by postcode
- ABS Regional population 2024-25 (population estimate basis)
- Bureau of Meteorology, Climate Data Online
- Australian Building Codes Board climate zone map
- AIRAH FairAir cooling calculator (design condition methodology)
- Consumer Data Right energy plan data (network and tariffs)
- energyrating.gov.au product database (zoned energy rating data)
Based on Australian Bureau of Statistics data. Source: ABS, Census of Population and Housing 2021 and Regional population 2024-25, licensed under CC BY 4.0. Climate data: Bureau of Meteorology, licensed under CC BY 4.0. Climate zones: Australian Building Codes Board. Tariffs: Consumer Data Right energy plan data. Appliance energy data: energyrating.gov.au (E3 Program).
Population is an estimate derived from the 2021 Census count scaled by regional growth to 2025, not an official count. Climate figures come from PORT HEDLAND AIRPORT (004032). Nearest qualifying station (still reporting, 78.2 yr of record, 99% complete). PORT HEDLAND AIRPORT (004032) is 5.3 km away, 6.4 km from the open coast against the suburb's 11.6 km, at 6 m against the suburb's 19 m. Stations are ranked on distance plus penalties for differing coastal exposure, elevation, NCC climate zone, record length and marine (sand-spit or island) siting.