mgbinspect Posted December 18, 2009 Report Share Posted December 18, 2009 The photos below are of an exhaust system for a 1966 oil-fired furnace Of course I wrote it up as a suspected oil-burner adjustment problem and called for the works. I'm curious what is causing this peculiar type of residue and leaching. I know that H20 is a big biproduct of natural gas exhaust, but I wasn't as sure about fuel oil. Could it be a restricted flue? Thought maybe someone will recognize this specific condition. Thanks in advance. Mike Click to Enlarge 42.19 KB Click to Enlarge 56 KB Quote Link to comment Share on other sites More sharing options...
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