Just so you know, the "artic", "polar", "4 seasons" means the underneath is covered with coroplast (plastic cardboard) with a piece of foil bubble wrap (reflectix type material), very little more weather proof than any other rv.
To answer your question though, you must run the furnace as it usually has a small duct blowing into that covered underbelly to aid in keeping tanks/plumbing from freezing. If you're in fact in "Artic" conditions expect things to be frozen, have lots of propane available & a couple portable heaters to stay warm.
Same in the summer, any rv over about 30' should be mandatory to have 2 acs to try to keep it cool high temps.
Another of the industries sales hype is "1/2 ton towable", very few of those are in fact towable by a 1/2 ton truck, too heavy.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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