In NSW the law is simple: every home must have at least one working photoelectric smoke alarm on every storey, and homes built after 1997 must be hardwired. Rental properties need a compliance check before each new tenancy. We install both types — 240V hardwired photoelectric alarms with 10-year sealed lithium backup, or standalone 10-year lithium alarms where hardwiring isn't practical — and interconnect them so when one triggers, they all sound.
Interconnection is the single biggest life-safety upgrade you can make. A fire in the laundry at 3am won't wake someone sleeping at the far end of the house on the top floor — unless every alarm goes off at once. Modern alarms interconnect wirelessly (no wiring between them), so we can retrofit interconnection to any existing hardwired or lithium install in about an hour per alarm.
For landlords and property managers we issue a formal compliance certificate on the same visit, testing every alarm, replacing anything past its 10-year date stamp, and photographing each unit for your records. Heat alarms — the correct sensor for kitchens and garages where photoelectric alarms cause nuisance triggers — are installed where required.