Ok…I didn’t get that exactly at the beginning…
So there is an API function to retrieve inserts (such as windows)
and apparently there is a node Element.Inserts in Clockwork package that does same thing.
So you can start with that.
But then you have to determine if the window is located next to the room in question.
I think you can do it as described here:
Eg. shoot a vector and use point in room node.