Looking for a web site that describes "frameless windows" being touted as a plus in some RV's. Best I can determine is that they are double pane? What about opening mechanisms?
Okay - two panes of glass - slightly thicker, but the same seal against the rig. But I'm sure it minimizes the heat / cooling transfer though the glass more than what I have.
Rig's new - just a month old. Give me a couple more months and a few hundred miles down the road - it will be plenty dirty.