Bathroom Vent Fan Roof. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. 12v roof vent ventilation ceiling exhaust fan for rv motorhome trailer 60cfm powerful silent wall and ceiling mount abs caravan roof ventilation extractor fan white 3 9 out of 5 stars 21 60 89 60.
Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof.
The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.
In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. Slide a flat pry bar underneath the shingles around the nail to break the weather seal. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. The 2nd bathroom vent drips on the floor and is ruining the ceiling.
