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roof bath vent

bricktron's picture

roof bath vent (post #215254)

hi folks, our bathrooms each have one window that open onto semi-enclosed light wells. odors and humidity stick around if the bath doors are closed, so we want to increase airflow. in-wall fans would be right next to the existing windows, make noise, and require a bunch of electrical work, so we haven't jumped at the chance to install them.


what about venting upwards to the (hip and valley) roof? even a small a stack effect might do the trick. a wind-powered turbine is also a possibility. the location is central california and so a little heat loss is OK, though the turbine is probably excessive. i don't have a clue how much cross-sectional duct area might address the problem. there's no advantage to a vent near the floor, right? what do you all think?

I think if you'll install a (post #215254, reply #1 of 2)

I think if you'll install a 4" vent pipe through the roof connected to a small electric vent fan your problems will go away.

Florida Licensed Building Contractor, 50 years experience in commercial remodeling, new homes, home remodeling and repairs and all types building maintenance.

I had a simillar problem.   (post #215254, reply #2 of 2)

I had a simillar problem.   Then I saw a "This Old House" you tube video of Tom (I think) installing a bath vent fan through the attic and out the roof.  He used insulated flexible ducting.  I'm sorry I don't have the link, but it should be a quick find via Google.  Good luck.