Was in the stoop space below my house checking things out to see if there was anything going on that needed addressing. During my inspection I found the duct that leads to the front floor register for this level appeared to be completely full of water in the insulation jacket (it's flex ducting suspended from the floor joists). I am at a loss to explain it. This duct is probably both the longest and lowest unit in the house and it is at least 4 feet off the floor (dirt) of the stoop space. There was no standing water in the stoop space.
Can this just be a case of condensation? If so can I prevent it some how in the future? We live in the south so high humidity is a fact of life as well as running the air a good bit in the summer not only to cool the home but also to dry it out some. The ductwork in the stoop space is below the level of the air exchanger in the garage, is this a possible problem? Should I call a contractor to come examine the system?