Mike Lamb Posted January 22, 2015 Report Share Posted January 22, 2015 I have an old brick chimney which has a new metal liner installed for the furnace and also has the insulated AC line set running up next to it to the roof. I am trying to find the coded reference that says no to this. This is what I have come up with: 1801.4 Space around lining. The space surrounding a flue lining system or other vent installed within a masonry chimney shall not be used to vent any other appliance. This shall not prevent the installation of a separate flue lining in accordance with the manufacturer's installation instructions and this code. Thanks. Quote Link to comment Share on other sites More sharing options...
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