Craig,
First, Welcome to the forum! This is a great place to learn and share.
Your rig will retain a lot of heat after your furnace is turned off and will likely not get down below freezing temps unless it is very cold before you start.
I have run my furnace for 30-60 minutes to get the rig warm before getting into camp without problems.
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Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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