Queensland Government recommends 240 volt Photoelectric smoke alarms (also called 'hard-wired smoke alarms'). These are connected to the house electrical system and have a battery back-up power supply.
Photoelectric smoke alarms are generally more effective than ionisation types because they 'see' the smoke by detecting visible particles of combustion. For this reason they are good at detecting smoldering fires and dense smoke, and are not as prone to false alarms (from cooking etc.).
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