 A fire can become fatal in less than 3 minutes therefore it is important that all smoke alarms be maintained and tested regularly. There are several types of smoke alarms, some are standalone or interconnected units, some are hardwired directly to your fire alarm panel. All smoke alarms need to be tested weekly, batteries replaced and units cleaned yearly as per the Australian standards. For further information we recommend that every property download the essential safety measures maintenance manual. Remember working smoke alarms save lives.