I use two of them in my weekend warrior trailer and run them all night no problems at all. I have the little buddy and big buddy and they are great. If i use the heater in the trailer when it is real cold out i will use 20 pound propane cylinder or 5 gallon cylinder in a day with the buddy heaters i use 20 pounds in a week.
I just turn them on when i,m in the trailer and it will knock off the cold in minutes. They are really great.