The floors in my 2013 MA, when on low, do not affect the backing on the rugs we have down, and my wife has that thick shelving material that keeps stuff from sliding around on several rug backs. Unfortunately, I don't know what all the backings are made of.
Even on low there is quite a bit of heat, so it's a legit concern. I know I would put up rugs on any setting above low.
"Second star to the right and straight on 'til morning"
On the Mississippi in SE Minnesota
2013 Newmar Mountain Aire 4336
2016 Chevy Silverado 4x4