The 2015 has what they call frameless windows. The outer window goes out I think about maybe 10 inches vertically. (I'm not exact no that) And the window inside even if it's open all the way the outer window in my opinion blocks the breeze. Others like them a lot so each his or her own. They are designed to not have leaks over time like the original ones can. I hope I explained that right. I'll take some photos of our projects hopefully today and post them.
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