Prescribed locations for installing smoke alarms – where practicable – must be placed on the ceiling.
Smoke alarms must not be placed:
- within 300mm of a corner of a ceiling and a wall;
- within 300mm of a light fitting;
- within 400mm of an air-conditioning vent;
- within 400mm of the blades of a ceiling fan.
There are special requirements for stairways, sloping ceilings, and ceilings with exposed beams. Specific requirements will be explained in the Building Fire Safety Regulation 2008 If impractical for the prescribed location requirements to be met (e.g. may be affected by steam from shower or fumes from cooking), the owner may put the alarm at another location that will provide a warning to occupants of the dwelling.