Smoke Alarm Comparisons
Side-by-side comparisons for smoke alarm types, interconnection methods, and installation approaches across Australia.
Photoelectric vs Ionisation Smoke Alarms
Compare photoelectric and ionisation smoke alarm technology — detection capability, false alarm rates, regulatory compliance, cost, and which type is required in Australia.
Photoelectric alarms are the only compliant option for new installations in Australia. They detect slow smouldering fires earlier than ionisation alarms and produce significantly fewer false alarms from cooking or steam. Ionisation alarms are faster at detecting fast flaming fires but are more prone to false alarms and are no longer approved for new residential installations under Australian regulations. Any ionisation alarms in a property must be replaced with photoelectric models to achieve compliance.
Hardwired vs Wireless Interconnected Smoke Alarms
Compare hardwired (240V mains) and wireless RF-interconnected smoke alarm systems for Australian homes — reliability, installation cost, compliance, and which suits different property types.
Hardwired alarms connected to 240V mains power with battery backup are more reliable long-term (mains power means no forgotten batteries) and are the standard for new construction. However, installation requires a licensed electrician to run cable between locations, adding $50–$80 per alarm in labour. Wireless RF-interconnected alarms avoid this wiring cost and are fully compliant under Australian regulations — they are ideal for retrofits in existing homes where running new wiring is impractical or expensive. Both types must be photoelectric.
DIY vs Professional Smoke Alarm Installation
Compare DIY smoke alarm installation with professional installation — compliance, safety, cost, rental property requirements, and when each approach is appropriate.
DIY battery smoke alarm replacement is generally legal for owner-occupiers replacing like-for-like units in most Australian states. However, hardwired alarm installation always requires a licensed electrician. For rental properties, professional installation is strongly recommended regardless of alarm type because a compliance certificate from a qualified installer is required to evidence legal compliance with tenancy regulations. DIY installation for rental properties creates legal liability risks that far exceed the modest cost saving.