Never give up; Never surrender!
Are you sure that wasn't from somewhere in rural NC? That would pass inspection in some of the locales I have done work... Seriously.. Well, maybe after the water heater flue was connected...
It's not rocket-science...
It's electromechanical thermodynamic engineering
The reason they un-hooked the WH flue was to heat the attic, DUH!
OMG.....i don't even wanna guess.