Robert Jones Posted December 12, 2009 Report Share Posted December 12, 2009 The furnace is approx 15 yrs old. The flue is vented to a masonry chimney(which is in poor shape). What would normally cause a drafting issue with this type of venting? There are no strange bends. It appears to have been going on for quite some time. Did I just ask a vague question? Click to Enlarge 40.32 KB Click to Enlarge 52.82 KB Click to Enlarge 63.8 KB Quote Link to comment Share on other sites More sharing options...
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