We have camped in the mid teens here in Georgia on several different occasions. Just unhooked the water hose the night before and waited until it thawed to hook it back up. Never had any problems with the unit freezing up. Nice and toasty as others have said.
2010 Jayco Quest G2(SOLD)
2014 Jayco Eagle 33.5RETS
2007 Ram 2500 5.9L Cummins(SOLD)
2015 Ram 2500 6.7L Cummins 4WD