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Darwin, Northern Territory

Air conditioning in DarwinBuilt for the build-up, not just the dry.

An installer for Darwin

Licence-checked installers in Darwin who specialise in your kind of job see it, and the one who takes it calls you to quote.

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In Darwin, air conditioning is a year-round job, and humidity matters as much as heat. Darwin Airport averages a 33.8-degree maximum in October, with afternoon humidity of 71% in January and 74% in February. Choose systems that dry the air as well as cool it, fix them to stay put in a cyclone, protect them from salt, and service them often enough to keep mould out.

Why Darwin is its own case

The build-up before the wet is the hardest stretch. October and November are the hottest months, and humidity climbs with the temperature. The wet season generally runs from December to March, when afternoon humidity averages over 70%.

Even the dry season isn't cool. Darwin Airport's July averages run from 19.3 degrees overnight to 31.1 in the afternoon, though humidity falls to 36%. Heating barely features here, and cooling runs most of the year.

What's different about Darwin homes

Climate zone 1

The national building code puts Darwin in zone 1, the high humidity summer zone, alongside Katherine. The zoned energy label puts it in the hot zone too, so the blue cooling stars are the ones to compare.

Humid air

Darwin Airport's average dew point is 24.2 degrees in January. CHOICE says evaporative coolers aren't recommended for humid climates, so refrigerated air conditioning is the practical choice.

Cyclone country

Lysaght's guide puts Darwin's suburbs in wind region C, cyclonic. The NT Government says homes built in cyclonic areas since Cyclone Tracy are generally designed to withstand a mid-range category 4 cyclone, but warns flying debris from loose items can be a significant factor.

Salt air

The NT Government warns that corrosive environments attack bolts, fixing plates and cyclone fixings, especially near the coast, and recommends a yearly look for corroded or loose brackets and bolts. The outdoor unit's bracket belongs on that list.

Units and renters

In 2021, 25.0% of Greater Darwin's homes were flats or apartments and 43.8% were rented. Body corporate rules and the owner's approval shape a lot of jobs here.

Raised tropical houses

Beni Burnett's tropical houses were raised off the ground, with louvres and screened walls to let air move through. Louvred rooms leak cooled air, so they need closing in before a split can hold them cool.

Power and storms

The northern network runs from Darwin to south of Katherine and serves about 150,000 people. When Cyclone Marcus struck in March 2018, approximately 26,000 homes lost electricity.

The jobs that come up most here, and why

Split systems suit bedrooms and living areas, the rooms you most want cool and dry through the build-up. Split system installation in Darwin covers drains, brackets and sizing.

Servicing carries more weight here because systems run most of the year in humid air, and dirty filters feed mould. Air conditioning service in Darwin explains what a good one covers.

Repairs stack up in the build-up and after storms, and corrosion wears outdoor units near the water, so ask about coastal protection on any new install. Air conditioning repairs in Darwin has the safe checks.

What we'd do

Where we'd start

If we were setting up a Darwin home, we'd start with a properly sized inverter split in the main bedroom, then the living area, with each outdoor unit fixed for cyclone winds and protected for salt. We'd book a service before every build-up and keep the filters clean in between.

How we help in Darwin

Heating hardly comes into it, though a reverse cycle split will take the edge off the odd cooler dry-season night. Tell us the job and your postcode, and licence-checked Darwin installers who specialise in it will see it, if we have them near you. Only the one who takes it gets your contact details. If no one in Darwin takes it within 48 hours, installers elsewhere in the Northern Territory may see it too.

What this work looks like

Photos from real jobs in Melbourne, to show what the work looks like. They aren't from an installer near you.

A new walkway built through a roof space before the ducts go in
A new walkway built through a roof space before the ducts go in. Sep 2022. A job in Melbourne.
A slot diffuser above a home study, one zone of a ducted system
A slot diffuser above a home study, one zone of a ducted system. Oct 2023. A job in Melbourne.
A ducted outdoor unit on wall brackets under a window
A ducted outdoor unit on wall brackets under a window. Sep 2019. A job in Melbourne.

More job photos

Heating and cooling jobs in Darwin

Questions people ask

Can I use evaporative cooling in Darwin?
It's not a good fit. CHOICE says evaporative coolers aren't recommended for humid climates, and Darwin's wet season afternoons average over 70% humidity. Refrigerated air conditioning, which takes moisture out as it cools, suits Darwin far better.
How do I look after my outdoor unit in cyclone season?
Make sure it's firmly fixed and that its bolts and bracket aren't corroded or loose. The NT Government recommends a yearly visual check of brackets and bolts around the house, and loose items become debris in a cyclone.
How often should I service my aircon in Darwin?
At least once a year, as Mitsubishi Electric recommends, ideally before the build-up. Clean the filters every two weeks in between, as Daikin advises, because systems here run most of the year.
Is there an air conditioning rebate in the NT?
We couldn't confirm a current Northern Territory heating and cooling rebate at the source. If someone offers one, get the scheme's name and the details in writing.
Who can install air conditioning in the NT?
The ARC refrigerant licence is national, so the same RAC01 and RSS03 rules apply in the Territory. NT electrical licences apply on top. We couldn't confirm their details at the source, so ask for every licence number.

Ready for the right installer to take a look in Darwin?

Your postcode and three quick questions. Licence-checked local installers who specialise in your kind of job see it, and the one who takes it gets in touch to quote.

Free for you. Installers pay us for each job we pass on.

Read next

  1. 01Heating and cooling in the Northern TerritoryNational licences in the NT, what to ask about the wiring, and what Darwin and Alice Springs each need.
  2. 02Air conditioning near the coastSalt, coil coatings, warranty fine print and where the outdoor unit should go near the sea.
  3. 03Evaporative or refrigerated cooling?How each kind of cooling works, why humidity matters, and what each one needs from your home.
  4. 04How often to service an air conditionerService intervals for each system, what your warranty may require, and what a service covers.
  5. 05How to check an installer's licenceRun the ARCtick check, read RAC01 and RSS03, and check the state licence too.
  6. 06Air conditioner leaking waterWhat's normal outside, what isn't inside, and the checks you can do yourself.

Where this information comes from

We don't publish prices. Every home is different, so an installer's written quote is the only real number. How we write and check these pages.

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