While I do not have a set of AVS Ventvisors on a class B motor home, I do have a set on the front, and rear windows of my 2004 Silverado. After having them, I would never go without. They allow me to roll the windows down a bit for ventilation, and not have worry about the weather, and my door controls getting wet. The quality is great, and I simply wax them when I wax the rest of the truck. They still look new after 10+ years.
I'm not exactly sure what you were asking, but hey....I gave it a shot.
Enjoy,
Jeff