quote:
Even a true soffit vent for the exhaust sounds like a bad idea to me and I'll continue to take chances by cutting holes in roofs to install roof vents for my bathroom ventilation.
Everything I can find shows about equal risks with both.
The idea of humid air reentering the soffit is not that big a deal b/c it is exhausted out with a decent velocity allowing good mixture before any chance of being sucked back into the soffit vent.
The roof vent adds another roof penetration which introduces another potential leak point, but that is handled by making sure that you do good work.
Seems like the pertinent code:
quote:
M1507.2 Recirculation of air.
Exhaust air from bathrooms and toilet rooms shall not be recirculated within a residence or to another dwelling unit and shall be exhausted directly to the outdoors. Exhaust air from bathrooms and toilet rooms shall not discharge into an attic, crawl space or other areas inside the building.
Along with
quote:
R303.3 Bathrooms.
Bathrooms, water closet compartments and other similar rooms shall be provided with aggregate glazing area in windows of not less than 3 square feet (0.3 m2), one-half of which must be openable.
Exception: The glazed areas shall not be required where artificial light and a local exhaust system are provided. The minimum local exhaust rates shall be determined in accordance with Section M1507. Exhaust air from the space shall be exhausted directly to the outdoors.
doesn't show exceptions for dumping into a soffit.