The fan above the toilet didn’t seem to make any discernable difference on how long it would take to get rid of the humidity after a shower. I wouldn’t care except for the mold such a situation often created. I don’t like to have to use toxic cleaners when possible, so I decided to take care of the situation.
For 300NT, I was able to buy 10m of ducting pipe. True to the aims of overpackaging in Asia, it came in its own box:
The result is ugly, but effective at moving air. I have asked the landlord if there is some way to drill another hole through the solid cement wall in order to exhaust the air directly outside, away from the screen that would normally just serve as an intake vent.