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The below picture shows the current position of the vent (the white area over the sink). The blue patch above the toilet is a small window.

The plan is to relocate the bath tub and position it along the wall so it will cover the vent. The new layout is in the second picture. The glass between toilet and tub is optional.

I am trying to understand where I should vent this duct. Should I do it on the ceiling or completely move it on the opposite wall? I don't know if I can try to re route it in the vertical wall, that will add some direction changes.

enter image description here

enter image description here

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  • I'd just shorten the duct and put it in the ceiling. It's a matter of space and your prerogative. Ideally it's near the outside wall to maintain comfort in cold/hot weather.
    – isherwood
    Commented Aug 5, 2020 at 16:11
  • I am afraid that if I put it on the ceiling hot water vapors and humidity will get in and the duct will rust as far as I understand it needs to vent out near the window to avoid cold patches and condense on that window. The air needs to move near that window ...not sure how it helped in that sense in the current position
    – MiniMe
    Commented Aug 5, 2020 at 16:20
  • If your duct rusts it's because you don't have (or don't use) an exhaust fan. That's an unrelated issue that will result in other problems anyway.
    – isherwood
    Commented Aug 5, 2020 at 16:21
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    Good. Put a timer switch on it and run the fan after every shower for 30-120 minutes, depending on climate and effectiveness. You should have virtually no condensation on the walls and ceiling.
    – isherwood
    Commented Aug 5, 2020 at 16:25
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    Even better than a timer: a humidity sensing switch. Ours is built right into the fan itself - turns itself on when it's humid, turns itself off when it's "dry". I think it's 60% from the factory and not adjustable, but it works pretty well and nobody forgets to turn it on or off.
    – FreeMan
    Commented Aug 5, 2020 at 16:41

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