Sounds like a very neat "heat tape" system. As fulltimers, the only time we have had low temps was in late June at a campground a little north of crater lake in oregon. Every morning it was magical as big snowflakes built up a white ground that melted mid day.
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2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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