Jerry Simon Posted February 22, 2018 Report Share Posted February 22, 2018 Should a decorative gas appliance (a pre-fabricated metal fireplace with a gas log-set) flue pipe vent/tie-into a draft-induced furnace's metal B-vent? I'm pretty sure this isn't okay as combustion fumes from the furnace could potentially draft back into the dwelling through the fireplace. Thanks. Quote Link to comment Share on other sites More sharing options...
Marc Posted February 22, 2018 Report Share Posted February 22, 2018 (edited) According to chapter 13 of NFPA 54 (fuel gas code), they can be joined but only in compliance with that chapter. Edited February 22, 2018 by Marc 1 Quote Link to comment Share on other sites More sharing options...
John Kogel Posted February 23, 2018 Report Share Posted February 23, 2018 I'd call it out, because chances are good it doesn't comply with Marc's rule. Quote Link to comment Share on other sites More sharing options...
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