Cause of basement bathroom condensation

8/26/2020 at 9:04:48 AM

Hello

After all it is a basement bathroom and we all know in the basements the air has a lot more moisture. I would suggest installing a bigger fan (more CFM rating) and upsize the exhaust pipe to 5 or 6 inch. Also

Make sure someone installs a moisture detecting sensor which will keep the fan running until all moisture is removed. I hope this helps.

Cheers

8/26/2020 at 9:12:05 AM

1st how did you confirm that the Venting is working properly? Did you do the toilet paper test?

2nd I am thinking you likely don't have a fan that have enough cfm? You needed something that is 1/7.5 of your cubic feet volume inside the bathroom

(w*d*h/7.5). Check your model of fan to see if it is enough.

3rd if the fan have enough cfm. Maybe you don't have enough air intake.. Is there a gap under the door of around 1/2 inch.. If not there may not be enough air for the fan to pull and it may become a Vaccum that stalls air instead and moisture will linger.

Those are the things I will look at first.. If not you need to look for for hvac company or etc.