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Clearance, nfpa 31

RLuck Member Posts: 24
A manual says 6 in clearance back and sides or to nfpa 31 latest edition. It's a real tight spot and I need every inch. What are the standards for nfpa 31 ? It's an oil boiler with sheetrock walls. Thanks can't find an answer elsewhere.


  • nicholas bonham-carter
    Make sure the inspector will see perfectly sealed and taped drywall with this, as most inspectors here (Nebraska), can make their own judgements on clearance to combustibles during the inspection.—NBC
  • RLuck
    RLuck Member Posts: 24
    But does npfa 31 allow for say sheet metal on the walls and 2 inches clearance, instead of manufacturer's 6 inch spec?
  • newagedawn
    newagedawn Member Posts: 586
    the only way to know is ask your local inspector what they recommend, they are the ones signing off, so word to the wise do what they want, but like nicholas said, every inspector can make a judgment call, hopefully your inspector has that,lol
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
  • Jack
    Jack Member Posts: 1,047
    You could look at putting the sheet metal a 1" standoff from the taped sheetrock. That is commonly done on wood stoves. Leave a gap at the bottom for convective air flow. Than as advised, ask the inspector before going ahead
  • Gordy
    Gordy Member Posts: 9,546
    Agree with @Jack. Sheet metal as a direct attachment to the walls has zero benefits. it ends up being a conductive material to the wall board.
    EBEBRATT-Ed Member Posts: 15,849
    Agree wit @jack & @gordy