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  1. #1
    dan orourke's Avatar
    dan orourke Guest

    Default Smoke alarm placement

    Last edited by dan orourke; 01-02-2008 at 08:21 AM.

  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,741

    Default Re: Smoke alarm placement

    Yes there are requirements/ restrictions on the placement of smoke detectors.
    I'm at home and my book is at the office so I may not be exact, but it says:
    on ceilings do not mount closer that 12" of wall or near a vent,
    when mounted on the wall, mount within 12" but not closer than 6" of ceiling.

    Mounting them to close to a vent or fan MAY cause a smoke detector to become to sensitive (false alarm) also should not be mounted outside of bathroom.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,317

    Default Re: Smoke alarm placement

    In addition to be spaced out from the wall and the ceiling, they have to be located away from air disturbing sources.

    Many smoke detectors used to say to place 5 feet from an air disturbing source, however, I believe most are now saying 3 feet.

    Some examples of air disturbing sources are:
    - supply registers
    - return air grilles
    - the ends of ceiling fan blades (figure a 52" ceiling fan is 26" from center, plus 36", equals 62" from center of its box to the smoke detector)

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,317

    Default Re: Smoke alarm placement

    Dan,

    "Many smoke detectors used to say "

    Manufacturer's installation instructions, that's where I read those things.

    It might address that in NFPA 72, which I thought I had, but I don't.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  5. #5
    Joe Nernberg's Avatar
    Joe Nernberg Guest

  6. #6
    Tom Davis's Avatar
    Tom Davis Guest

    Default Re: Smoke alarm placement

     No closer than 3' to any cold air return or supply, or ceiling fan. Nuisance alarms due to dust attraction are common when this is done, and the sensitivity can diminish.


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