Such as R values of insulation ? If so...
I don't know the values, but I ordered my 40 rls with the all weather package. Which included the insulated underbelly (spray on foam insulation), double pane windows, and heated holding tanks. I also ordered the larger 30k btu furnace. The 1st night we camped in it, it got down to 29 degrees and it was nice and comfy inside @ 68 degrees.
2016, 3500 DRW,CCLB,CTD,G56,3.73
Work and play 40RLS,
PROUD OF MY USAF and ARMY SONS !