Interconnected Smoke Alarms Australia: Wired, Wireless and QLD Compliance
What Are Interconnected Smoke Alarms?
Interconnected smoke alarms are linked so that when one detects smoke, every alarm in the home sounds. Anyone asleep or on another level hears the warning at the same time as whoever's nearest the smoke. Systems can be hardwired or wireless: hardwired suits new builds, and wireless suits existing homes you don't want to rewire.
Why Interconnection Matters
A standalone alarm only sounds where it's installed. Interconnection sets off every alarm in the home, which matters most in multi-storey homes and in bedrooms far from where the smoke starts. In Queensland, it's also the law: every required smoke alarm must be interconnected with the others.
Interconnected Smoke Alarm Requirements in Queensland
Smoke alarm interconnection requirements vary across Australia (our smoke alarm laws guide covers each state). Queensland has phased in its smoke alarm laws since 1 January 2017, and our Queensland smoke alarm legislation guide has the full details.
From 1 January 2027, all existing private homes, townhouses, units and manufactured homes in Queensland must have interconnected photoelectric smoke alarms. Homes sold or leased since 1 January 2022 must already comply, while homes built or substantially renovated since 1 January 2017, which must have hardwired alarms.
Queensland's rules cover the alarms themselves and where they are installed (source: Queensland Fire Department). Each required smoke alarm must be:
- Photoelectric and compliant with AS 3786:2014 (free of any ionisation sensors)
- Hardwired to mains power or powered by a non-removable 10-year sealed lithium battery
- Interconnected with every other required alarm, so that all units sound together
- Less than 10 years from manufacture date
- Working when tested
Required Alarm Placement:
- in every bedroom
- In hallways connecting bedrooms to the rest of the home (where no hallway exists, between the bedrooms and the rest of the storey)
- On every storey (on a storey with no bedrooms, at least one alarm must be placed in the most likely path to the exit)
Wireless interconnected smoke alarms connect over radio frequency (RF), meaning you do not to run wiring between them. Models with a non-removable 10-year battery meet the power requirement for existing homes, and you can install them yourself. To cover every bedroom, hallway and storey with alarms that pair seamlessly with each other, browse our Home Safety Store’s range of, interconnected smoke alarm bundles.
Wired vs Wireless Interconnection
Hardwired Interconnected Smoke Alarms
Each hardwired alarm is wired to the others and to your home's 240V mains supply, supported by a secondary backup battery if the power goes out. Queensland requires them in new homes and substantial renovations, so plan for them if you're building or doing major work.
Considerations
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Electrician required: A licensed electrician must install all 240V hardwired units.
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Extra electrical work: Depending on the property, you may need new wiring, or wall chasing, or you may need to replace existing hardwired baseplates.
Wireless Interconnected Smoke Alarms
Wireless alarms link to each other over a radio frequency (RF) signal, so you do not need to run interconnection wiring between rooms or open up ceilings or walls. Models with a non-removable 10-year battery do not need connection to your home's electrical supply, and you can pair more compatible alarms to the same network later if you need extra coverage.
Considerations
- Model compatibility: RF interconnection only works between compatible models, generally from the same brand and often the same series.
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Pairing required: Every alarm must be paired to the same RF network during setup, – otherwise, it will not sound with the others.
Choosing Interconnected Smoke Alarms
The right option depends on what's already installed and the rules in your state or territory.
Existing Home or Wireless Retrofit
With wireless RF alarms on a non-removable 10-year battery, you can interconnect them without rewiring and install them yourself. View our interconnected smoke alarm bundles for compatible alarms designed to work together straight out of the box.
New Build, Substantial Renovation or Hardwired Setup
Queensland requires hardwired alarms for these, and other states may too. Browse our photoelectric smoke alarms, including 240V hardwired options, which a licensed electrician must install.
Queensland Property
See our Queensland smoke alarm requirements for the full compliance breakdown before purchasing your alarms.
Frequently Asked Questions
Are interconnected smoke alarms required in Australia?
It depends on where you live, as each state and territory sets its own rules. In Queensland, every existing private home, townhouse, unit, and manufactured home must have interconnected photoelectric smoke alarms by 1 January 2027, and homes sold or leased since 1 January 2022 must already comply.
Can I connect smoke alarms wirelessly?
Yes. Wireless RF smoke alarms link to each other over a dedicated radio signal, which suits existing homes where running new wiring would mean opening up ceilings and walls. They only pair with compatible models, so check that every alarm in the system works with the others.
Are wireless alarms reliable?
Wireless interconnected smoke alarms are highly reliable when they comply with Australian Standard 3786:2014 and are installed and paired correctly. After setup, test one alarm and check that the others sound simultaneously. If one stays quiet, it is not paired to the network.
Do wireless interconnected smoke alarms use Wi-Fi?
No. Wireless interconnected smoke alarms link up over their own radio frequency signal, so they do not require Wi-Fi and continue working even if your internet drops out.
Do all smoke alarms in the house need to be interconnected?
In Queensland, yes. Every required smoke alarm must be interconnected with the others, so the alarms in each bedroom, in hallways connecting bedrooms to the rest of the home, and on every storey all sound together. Other states and territories set their own rules, so check the requirements for your property.
Do interconnected smoke alarms need to be the same brand?
Yes, in practice. RF interconnection works only between compatible models, usually the same brand and often the same product series. Unless the manufacturers confirm two brands will pair, you should purchase every alarm in the system from the same range.
Do I need an electrician to install interconnected smoke alarms?
No, provided you are using wireless RF alarms with a non-removable 10-year battery, which you can mount and pair yourself. 240V hardwired alarms connect to your home's mains power, so a licensed electrician must install them.
Shop Interconnected Smoke Alarms at Home Safety Store
Home Safety Store is Australian-owned and operated, and we have supplied home safety products to Australian families since 2016. We stock photoelectric smoke alarms from brands including PSA Lifesaver and PSA HomeGuard, and our interconnected smoke alarm bundles group compatible models together, so you do not have to match alarms yourself. If you're unsure which setup suits your home, our local support team can talk you through it.