"Kenneth" wrote in message
Consider the analogy (though far more extreme) to a clothes
drier:

It heats the air in the drum, the RH goes down, the water in
the clothes is drawn to the air, and that moist air (with
the water it carries) is expelled by a fan via the duct.

It would appear to me that much the same thing would happen
in the case of the window:

So how long should he run the dryer with the window in it? I'd recommend
the permanent press cycle.