Bathroom, closet adjacent, prevent moisture trapping

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Alphy11

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Hi all,
So, I recently got a new condo, which for some reason, the master closet is off of the bathroom. In addition, the fan is mounted higher on the wall, rather than the ceiling, and seems to not be completely effective at removing moisture. So, I am worried about moisture getting trapped in the closet. Is weather stripping the closet a good idea? Or what is the best way to prevent moisture from entering the closet? There is no other ventilation coming out of the closet, than the door into the bathroom.
 
Just keep the closet door closed and run the fan longer after a shower when you can leave the other door open..
Hold a kleenex close to the fan and see if it is sucking air to make sure it is working properly.
 
Given that using a shower and your closet usually go hand in hand, closing the door probably just keeping the door closed isn't the best option. You need to determine if there is enough of an increase in humidity in the closet to even worry about. A shower isn't run all day so any spike that it may cause may be inconsequential. You could just put a hygrometer in the closet to monitor the humidity level as it compares to the rest of your home.
If it's elevated, and an issue, you could just use a small dehumidifier in the closet.
 
Sound like you're describing two problems that may be related. The bathroom fan may be ok even it is mounted on the wall instead of the ceiling. The question there is whether it is venting to the outside or just dumping the moist air into another space. Is the fan on the closet wall? Is it on an outside wall? Can you tell if there is a vent on the outside of your unit that the fan may be feeding? The tissue test will tell you whether the fan is drawing air, but you can do a smoke test using a stick of incense or a cigarette...or a doobie if you prefer;), to see where the smoke goes after the fan draws it in.

Putting a tighter seal on your closet door could make the problem worse, because as soon as you open the door (after a shower) the moist air will be drawn in and will have no place to escape once the door is closed. You may need to increase the ventilation between the closet and the rest of the unit; perhaps with a passive vent in the wall.
 
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