Where Smoke Detectors Are Required
- In all sleeping rooms
- On each level of the dwelling unit
- Outside of each separate sleeping area, in the immediate vicinity of the sleeping rooms
For purposes of this guide, smoke detector and smoke alarm shall be considered the same.
- Install in accordance with the manufacture’s listing and instructions and shall comply with the following requirements:
- Flat ceilings - Shall be located no closer than 4 inches from the adjoining wall surface.
- Peaked ceilings - Shall be located within 36 inches horizontally of the peak, but not closer than 4 inches vertically to the peak.
- Sloped ceilings - Having a rise greater than 1 foot in 8 feet horizontally shall be located within 36 inches of the high side of the ceiling, but not closer than 4 inches from the adjoining wall surface.
- Wall mounting - Shall be located not closer than 4 inches from the adjoining ceiling surface and not further than 12 inches from the adjoining ceiling surface.
- Specific locations:
- Shall not be located where ambient conditions, including humidity and temperature are outside the limits specified by the manufacturer.
- Shall not be located within unfinished attics or garages or other spaces where temperatures can fall below 40ºF or exceed 100ºF.
- Where the mounting surface can become considerably warmer or cooler than the room, such as a poorly insulated ceiling below an unfinished attic or an exterior wall, smoke detectors shall be located on an inside wall.
- Detectors installed within a 20 foot horizontal path of a cooking appliance shall be equipped with an alarm silencing means or be of the photoelectric type.
- Shall not be installed within a 36 inch horizontal path from a door to a kitchen or a bathroom containing a shower or tub.
- Shall not be installed within a 36 inch horizontal path from the supply registers of a forced air heating or cooling system and shall be installed outside of the direct airflow from those registers.
- Shall not be installed within a 36 inch horizontal path from the tip of the blade of a ceiling suspended fan.
- Where stairs lead to other occupied levels, a smoke alarm or smoke detector shall be located so that smoke rising in the stairwell cannot be prevented from reaching the smoke detector by an intervening door or obstruction.
- For stairways leading up from a basement, smoke detectors shall be located on the basement ceiling near the entry to the stairs.