Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Combustion air duct

zepfan
zepfan Member Posts: 315
Does any one know if in NFPA 54, or the IFGC it lists the minimum gage metal needed for combustion air into a boiler room? The room in question has on 400 mbh boiler. I can’t find a minimum size listed. Thanks to all

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 5,323
    I've only seen 24ga for a thimble listed as minimum.
    steve
    zepfan