Moranbah 4744Climate zone 2 · Ergon

Air conditioning
in Moranbah

A 30 square metre living room in Moranbah needs about 4.8kW, against 3.38kW for the same room in Robina, because Moranbah peaks at 39.1°C where Robina hits 30.7°C. Installed prices here run $1,300–$3,500 for splits.

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Why Moranbah is different

Sizing advice written for "Brisbane" is written for an average that barely exists. Moranbah accumulates 597.7 cooling degree days a year and clears 35°C about 74.9 days. Robina, elsewhere in QLD, accumulates 117.6 and clears 35°C about 0.5 days — roughly 5 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 Moranbah

Room	Approx size	Cooling needed	Unit to look for
Bedroom	12m²	1.92kW	2kW
Large bedroom or study	18m²	2.88kW	2.5kW
Small living area	25m²	4kW	4.2kW
Living room	30m²	4.8kW	5kW
Open-plan living and dining	45m²	7.21kW	7.1kW
Large open plan	60m²	9.61kW	9.5kW

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

Moranbah sits in the Ergon network area, where a residential flat rate currently runs about 26.27c per kilowatt hour (Origin Energy Origin Standing). On that rate, a typical 3.5kW split system used normally costs roughly $211 a year in cooling, against about $41 for the identical unit in Robina.

That figure comes from the energy rating scheme's own registered consumption figures, measured across three Australian reference climates and fitted to Moranbah's 597.7 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.

Watch the peak window.

On a time-of-use plan in this network, electricity between 16:00 to 20:59 costs about 19.04c against 16.83c 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 Moranbah

Sizing for 39.1°C, not for the average

Moranbah reaches 39.1°C on its hottest days and clears 35°C about 74.9 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.

Ducted is genuinely viable here

81.9% of Moranbah 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.

Newer housing, simpler installs

A median age of 31 alongside 81.9% 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 Moranbah tend to cluster more tightly than in older areas.

Installed prices

System	Installed price	Suits
Small split (2.5kW)	$1,300–$2,200	Bedrooms and studies
Large split (5-7kW)	$2,300–$3,500	Living areas
Ducted, whole home	$9,000–$15,500	Houses with roof access

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

About Moranbah

Around 9,736 people live in Moranbah (estimated for 2025), across roughly 2,634 occupied dwellings. The housing mix is 1.4% apartments, 81.9% separate houses and 16.6% 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 Moranbah'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 MORANBAH AIRPORT (034035). Nearest qualifying station (still reporting, 14.6 yr of record, 98% complete). MORANBAH AIRPORT (034035) is 7.6 km away, 141.0 km from the open coast against the suburb's 141.2 km, at 232 m against the suburb's 253 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.

Air conditioning in Moranbah: questions

What size air conditioner do I need in Moranbah?

For a typical 30 square metre living room in Moranbah, about 4.8kW, which in practice means a 5kW unit. Bedrooms usually land around 2kW. That comes from Moranbah's design temperature of 39.1°C, against 30.7°C in Robina, 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 Moranbah?

Roughly $217 a year in cooling for a typical 3.5kW split used normally, on Ergon network rates of about 26.27 cents a kilowatt hour. That figure starts from the appliance's registered energy rating and is then scaled by Moranbah'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 Moranbah?

Usually yes. 81.9% of Moranbah 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 Moranbah?

Autumn through early spring, before the summer rush. Installers discount to keep crews busy in the quiet months, and the same job carries a premium in the weeks after the first serious heat arrives, when everyone calls at once.

Air conditioning in Moranbah