Kambah 2902Climate zone 7 · Evoenergy

Air conditioning
in Kambah

A 30 square metre living room in Kambah needs about 4.01kW, against 5.38kW for the same room in South Hedland, because Kambah peaks at 34.4°C where South Hedland hits 42.5°C. Installed prices here run $1,550–$3,900 for splits.

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Why Kambah is different

Sizing advice written for "Canberra" is written for an average that barely exists. Kambah accumulates 30.9 cooling degree days a year and clears 35°C about 7.9 days. South Hedland, interstate, accumulates 1395.7 and clears 35°C about 153 days — roughly a 45 times lighter cooling load. 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 Kambah

Room	Approx size	Cooling needed	Unit to look for
Bedroom	12m²	1.6kW	2kW
Large bedroom or study	18m²	2.41kW	2.5kW
Small living area	25m²	3.34kW	3.5kW
Living room	30m²	4.01kW	4.2kW
Open-plan living and dining	45m²	6.01kW	6kW
Large open plan	60m²	8.02kW	8kW

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

Kambah sits in the Evoenergy network area, where a residential flat rate currently runs about 33.47c per kilowatt hour (EnergyAustralia Standing Offer (Home)). On that rate, a typical 3.5kW split system used normally costs roughly $49 a year in cooling, against about $641 for the identical unit in South Hedland.

That figure comes from the energy rating scheme's own registered consumption figures, measured across three Australian reference climates and fitted to Kambah's 30.9 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.

Watch the peak window.

On a time-of-use plan in this network, electricity between 07:00 to 08:59 costs about 43.34c against 24.65c off-peak. Cooling the house hard through that window is where summer bills actually get away from people. Pre-cooling before it starts costs noticeably less.

Local factors

What changes a quote in Kambah

You probably need less than you think

Kambah accumulates only 30.9 cooling degree days a year and clears 35°C about 7.9 days. Oversizing is the common and expensive mistake here: too much capacity short-cycles, dehumidifies poorly and costs more upfront and to run. If an installer quotes a size up without measuring the room, ask them to justify it.

Winter matters as much as summer

With 1842 heating degree days and July mornings averaging 0.1°C, a reverse-cycle system in Kambah earns its keep for heating at least as much as cooling. Ask for the heating output at low ambient temperature rather than the nominal kW, because that figure is what determines whether it copes on the coldest mornings.

Ducted is genuinely viable here

84.6% of Kambah dwellings are separate houses, most with accessible roof space, which makes ducted a real option rather than a stretch. The check that matters is roof cavity height and insulation condition, and any installer can confirm both in a five-minute inspection before quoting.

Established housing, check the switchboard

Kambah has a median age of 41 and correspondingly older housing stock. The thing that catches people out is electrical: an older switchboard may not have a spare circuit for a large system, and that upgrade is legitimate money rather than an upsell. Ask for it to be itemised separately in the quote so you can compare like with like.

The peak window costs real money here

On a Evoenergy time-of-use plan, electricity runs about 43.34 cents during the peak window (07:00 to 08:59) against 24.65 cents off-peak, close to double. Cooling the house hard through that window is where summer bills get away from people in Kambah. Pre-cooling before it starts costs noticeably less for the same comfort.

Installed prices

System	Installed price	Suits
Small split (2.5kW)	$1,550–$2,450	Bedrooms and studies
Large split (5-7kW)	$2,600–$3,900	Living areas
Ducted, whole home	$11,000–$17,000	Houses with roof access

Canberra pricing. See the full Canberra cost guide for a breakdown by job, or the the ACT rebate guide for discounts that come off these figures.

About Kambah

Around 15,874 people live in Kambah (estimated for 2025), across roughly 5,852 occupied dwellings. The housing mix is 1.9% apartments, 84.6% separate houses and 13.3% 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 Kambah's.

Sources and 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 TUGGERANONG (ISABELLA PLAINS) AWS (070339). Tuggeranong (Isabella Plains) AWS is 5.1 km away in the same Tuggeranong valley.

Air conditioning in Kambah: questions

What size air conditioner do I need in Kambah?

For a typical 30 square metre living room in Kambah, about 4.01kW, which in practice means a 4.2kW unit. Bedrooms usually land around 2kW. That comes from Kambah's design temperature of 34.4°C, against 42.5°C in South Hedland, which is why the same room needs a different size in each. Any installer should still measure the room, since orientation, glazing and insulation move the answer.

What does it cost to run air conditioning in Kambah?

Roughly $47 a year in cooling for a typical 3.5kW split used normally, on Evoenergy network rates of about 33.47 cents a kilowatt hour. That figure starts from the appliance's registered energy rating and is then scaled by Kambah's own cooling degree days against the reference site the rating uses, because without that adjustment every suburb in the zone would show an identical number. If you are on a time-of-use plan, the peak window is where summer bills actually get away from people.

Can I get ducted air conditioning in Kambah?

Usually yes. 84.6% of Kambah dwellings are separate houses, and most have the roof access ducted needs. The practical checks are cavity height, insulation condition and whether your switchboard can carry the load, all of which an installer confirms on a short site visit before quoting.

When is the cheapest time to install in Kambah?

The shoulder seasons, and in Kambah that means autumn or early spring. Demand here peaks twice, for cooling in summer and heating in winter, so the quiet windows sit between them. Quoting in a quiet window gets sharper prices and avoids the queue that forms after the first extreme day of either season.

Air conditioning in Kambah