Properly ventilate an interior bathroom

Hello,

a practical question. I hope I am in the right forum section for this? If not, please move it, thanks.

We have an interior bathroom, so without a window. Now there is a ventilator that always turns on when the skylight is switched on. After bathing or showering, sometimes it seems too short to me if I don't leave the skylight on longer. Are there any guidelines that perhaps balance room size, time, and humidity?

Best regards, Gerda

Hello Gerda,

then I want to reply to you here because you helped me so much with the café curtains.
My sister also has a bathroom without a window.
But she keeps the ceiling light on a little longer when it gets very humid in the bathroom from bathing or showering.
However, she has specifically screwed in an energy-saving lamp to reduce electricity consumption.
I myself always find a window better.

Marie

Yes, I find these internal bathrooms terrible, no real way to get the moisture out of the rooms, especially in a wet room. What the architects were thinking here is a mystery to me :( because these fans that turn on when you switch on the light are not always very effective, plus the additional power consumption

I can confirm that. The power consumption should not be underestimated. If you have children and the bath runs for one or two hours, the fan and the light are always on. That adds up over the month. Today, I would always try to get a bath with a window, and the house should also be planned that way, in my view. But since you probably have it like this now, maybe you can leave the door open more often and ventilate and heat the adjoining room?

mmh leaving the door open probably isn't very beneficial. On the one hand, more humidity gets into the other rooms that way, and another reason, if you ever got really angry... mmh I wonder if it's good when it smells like that throughout the whole apartment :)

Thank you for the many responses. Yes, a bathroom without a window is not ideal, but what can I do :) The thing with the adjoining room is also not so simple, since it would be the hallway and that has no window either. Otherwise, of course, we do that. Open all the windows and the room doors so that fresh air gets in everywhere. But apparently no one knows about values that are based on room size or something like that? Best regards Gerda