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Common venting for mod- con boilers?

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Gasper
Gasper Member Posts: 148
in Domestic Hot Water
Is it possible to combine venting of multiple mod-con-combi boilers?  They would handle separate spaces in an apartment building.  The building is a historic structure, which makes the venting a tough issue.  Thanks

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  • SWEI
    SWEI Member Posts: 7,356
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    yes, if

    The boiler manufacturer supports it.
  • meplumber
    meplumber Member Posts: 678
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    Ditto

    SWEI is correct. It has to do with the listing.



    If the manufacturer had it tested by UL or CSA with common venting then yes. If not then no. Check with your manufacturer.
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