Originally Posted by
DavidR
Scott if you run up on this it needs to make a report if it's from the flue gases as it is a defect, flues are not meant to condense on the inside unless it's a condensing furnace.
There are ways to fix these condensation issues that require the addition of a post purge circuit.
Could be, but this IMO is way outside the scope of a home inspectors job. Now, if you have an HVAC background and you see this as a problem you will not agree with my philosophy. Chances are that the small amount of rust stains were just one of several other signs that one could see if we had an entire picture of the flue pipe, etc.
Based on that picture, I do not see it as a problem and truth be known I don't know if I would have even seen it unless there were some other signs.