I received a call from a couple interested in our handyman services the other day. Looking at their issue, I saw 2 bathrooms where PVC pipe was connected directly to ceiling exhaust fans, and then run straight up through the roof. The run in each case is probably about 12-15'. In cold weather, enough condensation is present to have water dripping from the fans, onto drywall, and onto the floors. Some insulation is present where the fans are, but I don't believe the PVC is insulated in any way. They do have elbows on them above the roof, so nothing is getting in there, except extremely cold air. The fans themselves are not high quality either, so I doubt there's much force pushing the warm moist air through to the roof openings. Any thoughts or proven solutions to this issue would be appreciated. I have not seen PVC used in this application before, and am a little stumped as to the most cost effective solution. The house is also under an agreement of sale, so the owner is interested in fixing this for the new owners, but would obviously like to do so economically.