Wow! Glad you brought this up... seems to have been around for some time. 2005 and earlier roadtreks, http://www.everything-about-rving.com/the-windows-are-falling-out-of-my-2005-roadtrek-210-poplar-rv.html but news to me.
Will show this Mrs V, and see how anxious she is to get those framele$$ window$ now. :lol
Interesting to see them called 'louvered' windows. I have only seen windows (like those referenced above) called awning windows, with louvered and jalousie being synonymous and describing the multi-slat windows commonly seen down here in older campers or non-AC building construction. Or a desired option on VW campers.. Got them on mine.
(https://image.mamotorworksmedia.com/imageproc.aspx?img=~/production/website/sku/353/353060/353060_DiagramClose.jpg&h=369&w=369)
I suppose calling them 'awning windows' in the RV industry would lead to confusion, and so people took to calling them louvered. (WH)
Either way.... good to know. Thanks Gandalf42!! tymote