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Thread: Single Wall Boiler Vent - Combustibles Clearance

  1. #1
    DIY Senior Member molo's Avatar
    Join Date
    Sep 2006
    cold new york

    Default Single Wall Boiler Vent - Combustibles Clearance

    I am building a basement window cover. There is a boiler vented with 3" Stainless Steel vent pipe through the basement window opening. I would like to incorporate a 2" rigid foam Dow board into the new cover.

    Does anyone know the required clearance between the vent pipe and the foam board?

    Thank You,
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona


    6" is the standard for single wall vent pipe.
    Licensed residential and commercial plumber

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