No they are not 4 season coaches but with a little work they can be. I have ran heat to the bays that are needed, insulated all the water lines below the floor, and cut n access panel behind the water heater to get in behind it and insulate the pipes and around the water heater. We have camped in 10 degree weather for 3-4 days with no issues. Before I insulated behind the water heater we did have issues with the water heater supply line freezing but could quickly thaw by running the generator as the line was warmed from the heat. It’s all fun Nd games until your gas furnace quits at 2am in 10 degree weather while boondocking
At lease I was carrying the spare parts to get it running again.