I went camping this past weekend in Hershey,PA in order to go to the RV show. Although it was a great trip, it got cold in the evening and at night the temp dropped down into the 40's. It wasn't a pleasant experience. I was warm in the sleeping bag while sleeping but once I jumped out of bed I felt like I was freezing. I did have a heater on my older model coleman mach AC unit that worked rather well until the temp hit the 60's and than the heater struggled to keep the pup warm. It seemed to blow cold air at that point although the coil was hot. I guess I'll have to wait until the next camping season to head out again since I am not a cold weather enthusiast.