Bathroom vent not strong enough, discoloring on walls with gloss paint?

When I first purchased this 1962 Cap Cod home in 1996, our full bath didn't have a vent. The bathroom is about 8x8, so I purchased a 75 cu. ft. vent and light thinking that would be enough. I was wrong.


We often have the trouble of taking a hot shower and the bathroom steaming up. When I first placed the bathroom fan in the ceiling, I cut a hole in the roof and attached exhaust ducting (the plastic flexible kind, like for a dryer). Although some steam went outside, most of it wound up on the walls and ceiling of the bathroom. So much so, that it discolored the walls.


We recently remodeled the bathroom, and purchased a bigger cubic ft. exhaust fan (125) thinking the problem was that the old fan wasn't sucking enough. Since I wanted to make sure that it would work, we waited to see if the fan was strong enough to eliminate the discoloration problem. The new, larger fan still didn't work. Someone suggested using metal flexible ducting instead. Will that work?Bathroom vent not strong enough, discoloring on walls with gloss paint?
Smooth galvanized steel ducting is the best. The flexible kind creates more friction to the moving air and the fan motor can't push as much through as fast. Checkout the installation tips at http://www.askthebuilder.com/546_Bathroo鈥?/a> especially the part about insulating the duct to avoid condensation streaming back down it. That would not only come back into the fan, but also increase the air friction even more.Bathroom vent not strong enough, discoloring on walls with gloss paint?
Ducting is Ducting Metal/Plastic both ends are open.,


Bigger Fan, Again or Install a window that of which are generally easy to DIY the biggest problem with that would be what type of exterior walls do you have., Wood, Vinyl %26amp; the Like (Easy)- Stucco (Less Easy More Money)





Good Luck!