Rich,
ok, if it got down to 27.6 outside
and inside at 8 AM it was 28.6
and the outside temp was 31.7 at 8 AM
my take on this??
is that the temp inside your rig did not get as low as the temp outside, but maybe close.
and it was warming up faster outside, but, our experience is that if there is no sun or little sun it takes a long while to get the inside as warm as the outside.
we have never heated the inside of the rig UNLESS it has freezable items in there, since we don't want to pay to heat it for 2 to 3 months (before exiting and heading south), we take out ALL freezable items when we winterize. You might have the right idea, keep it warmer, maybe that would protect it from dampness damage, just don't know. Have been doing it our way, (no heat) for years, and I don't think we have experienced any damage from doing so. Lots of people have to store their rigs in storage lots, and most of them cannot heat the unit. Sure you have your reasons for doing so, but from our front porch, it is a waste of heat and $$. (you know the routine, our way, works for us, your way works for you.)
We feel Tana holds the high temps better (like 80) than it does the low temps (like 26)
course, we have a much older unit than you, yours is built for better cool weather living than ours.
Best comment in your post, we intend on leaving ........
(ahhhh, yea, that is the best!
)