I’ve always wondered about the same, but never had freezing issues on our annual winter trip to Florida. First couple days of trip we always had the same conditions, freezing or above during the day and way below freezing at night.
I think the residual heat captured in the rig from overnight use makes it very difficult for freezing to occur so quickly during a single day of no heat in the coach while traveling. Remember that everything that is in the coach becomes a heat source, as all the materials that were warmed up also need to release their heat and cool down, including furniture, floors, walls, etc., so fully cooling down to freezing or below doesn’t happen quickly.
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Todd
Just outside Philly
2018 377RLBH
2019 Ford F450 Platinum
Old Faithful: 2004 GMC Sierra 3500 Diesel Dually
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