Mind that if
It should also be borne in mind that if the window is equipped with a valve or an exhaust fan, then in winter the steam will accumulate not only on the window glass of the attic but also on the cold, not heated walls of the bathroom.
It should also be borne in mind that if the window is equipped with a valve or an exhaust fan, then in winter the steam will accumulate not only on the window glass of the attic but also on the cold, not heated walls of the bathroom.