Smoke alarms usually need replacing after about ten years, even if they still sound during a test. Follow the alarm’s marked replacement date and manufacturer instructions. For a Melbourne home, check the age, type and placement of each alarm, then confirm which requirements apply to the property.
The ten-year rule and the test button
Look for the replacement date or age information on the alarm and check its manual. Do not assume every model calculates its service life in exactly the same way. If you cannot establish its age, arrange an assessment rather than guessing. CFA’s maintenance guidance recommends replacing smoke alarms after about ten years.
A successful button test does not extend an alarm’s replacement date. However, it is also incorrect to say that every test button checks only the battery and sounder. For example, the Brooks EIB3000-series manual, page 31 says its test checks the sensor, electronics and sounder. Use the procedure specified for your model.
Regular testing still matters before the replacement date. CFA recommends monthly testing. Follow the manufacturer’s cleaning and battery instructions, including the distinction between replaceable batteries and sealed batteries. Do not disconnect fixed wiring or expose electrical terminals to find a label; ask an electrician if access is uncertain.
Choosing a suitable smoke alarm
Photoelectric smoke alarms use an optical sensor to detect smoke; some products combine more than one sensing method. The product, its location and its compatibility with other alarms all matter. The Brooks manual, for example, distinguishes photoelectric, multi-sensor and heat alarms and specifies where each is suitable.
Choose alarms that meet the applicable requirements and suit the rooms where they will be installed. Do not assume different brands or models will interconnect, or that changing sensing technology excuses poor placement. Ask your installer to explain the proposed alarm type, locations and replacement schedule.
When alarms need to be interconnected
Interconnected alarms communicate so that one activating causes the others to sound. CFA recommends interconnection to improve the chance that occupants hear the warning. Wired and wireless interconnection are different from the way an alarm receives its power.
According to CFA’s Victorian requirements summary, homes built before 1 August 1997 may have standalone battery alarms; homes built after that date require mains-powered alarms with battery backup. Where multiple alarms are required in homes built or largely renovated after 1 May 2014, they must be interconnected. Other building circumstances can affect the requirements, so have the applicable arrangement checked.
When replacing alarms, ask whether compatible interconnection can be included and what it adds to the quote. The answer depends on the existing equipment and wiring access. Do not replace a required mains-powered alarm with a battery-only unit simply because it is easier to fit.
Placement: minimum requirements and extra protection
The minimum required arrangement and the recommended level of protection are not identical. CFA describes alarms between bedroom areas and the rest of the home, with an alarm on each level of a multi-level home. It also recommends additional interconnected alarms inside bedrooms. See the CFA explanation of bedroom protection.
Ceiling shape, airflow, obstructions and nearby sources of steam or cooking fumes affect placement. Use the manufacturer’s clearances and the requirements applicable to the building rather than a generic distance copied from another alarm model. If nuisance alarms keep occurring, have the cause assessed; do not disable the alarm.
Victorian rental-property requirements
From 25 November 2025, annual smoke-alarm safety checks apply to all Victorian rental properties. Rental providers must ensure alarms are correctly installed and working, with testing at least every twelve months according to manufacturer instructions. These annual obligations do not replace the more frequent routine testing recommended for occupants. See Consumer Affairs Victoria’s smoke-alarm guidance.
Rental providers must also give renters operating and testing information at the start of the agreement. Renters should report faults and must not remove or disable alarms. A non-working alarm is an urgent repair: the rental provider must arrange repair or replacement immediately after being notified.
When booking a check, confirm which alarms will be checked, whether replacements are included, and what record you will receive. Amber Pro’s smoke alarm services page explains how to enquire about this work.
Frequently asked questions
Does a passing test mean an old alarm can stay?
No. Continue the specified tests, but replace the alarm at its marked replacement date or the end of its manufacturer-specified service life. A passing button test does not cancel that limit.
Do wireless interconnected alarms replace the need for mains power?
Not automatically. Interconnection describes how alarms communicate; the power-supply requirement is a separate question. Check the property’s requirements and the exact models before replacing an existing system.
Can I install or replace a hardwired alarm myself?
Hardwired installation requires a qualified electrician. Electrical installation work must be accompanied by a Certificate of Electrical Safety. The term “prescribed work” has a specific Victorian meaning and should not be used as a blanket label for every hardwired alarm job. The electrician must determine the correct certification for the work. Energy Safe Victoria explains licences and certificates.
Is the annual rental check the same as routine testing?
No. The rental provider’s annual safety-check obligation and the manufacturer’s routine maintenance instructions serve different purposes. Follow both, and report a fault promptly.
What to do next
Make a note of each alarm’s model, replacement date and location if you can do so safely. If any of that is unclear, or you are organising a rental check, contact Amber Pro about a smoke-alarm assessment. Ask for a clear scope covering replacement, placement, interconnection and the documentation appropriate to the work.