Mac,
This has been touched on a few times before, you might benefit from a search (see top of page, AND on main page, down the right side, see yellow Archive buttons)
We find we do not need to winterize till the temps get down to 20 and stay there for more than, say, 4 hours (in one night). When Montana is sitting in Tipton, it does not have water in it, cept, like the water heater. When we are in a campground, the basement is heated somewhat (your unit is MUCH better than ours is for withstanding the cold as it is newer and you have some nice improvements in that area over what we got), and that usually keeps it from freezing up down to about the same area.
Many of our fulltimers have figured ways to stay in some pretty cold temps. Again, try a search, there have been some GREAT articles on this.
Here where we are, lower Michigan, close to Ohio, we usually winterize November 1st.
However, if you feel it might freeze up, it is not worth worrying about and not worth risking the repairs you might face if it does freeze. SOOOO, when in doubt, WINTERIZE!
|