Smoke Alarm Laws state that any home constructed prior to July 1, 1997, must have a minimum of one smoke alarm in the home, and this alarm must be operated by a 9-volt battery. Homes constructed or renovated considerably after this date need to have a hardwired 240-volt smoke alarm. Any building requesting approval on or after May 1, 2014, must include interconnected and hardwired smoke detectors.
Smoke Alarms Installation plays a role in the effectiveness of these devices. The alarms need to be placed on the ceiling, if possible, or high on walls in the home. The alarms need to be placed in a hall or close to sleeping areas. In homes with more than one story, multiple alarms are required, and those who sleep with their bedroom door closed need an alarm installed in their room.