Have not heard of anyone directly changing out this window for a different style. In general it is just a simple window replacement. There are posts on creative methods to add a screen to the window.
Our TT has a escape window with a window screen. The Red bar, opens and props the window open.
When it is raining, I can easily leave this window open and no be to concerned about the rain coming in.
Not sure what size your window is, but I would look to see what other options you have.
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