I have a 36 foot Mobile Suite and I use to use three portable heaters to try to heat my camper. I installed the Cheap Heat System about four years ago and have yet to refill my propane bottles. This up grade is not cheap but is worth every penny. I keep my camper plugged in at my house when not in use and keep the electric Cheap heater set at 50 degrees. This system heats my camper evenly and also heats the underbelly. Check this system out on rvcomfortsystems.com. I have a 50 amp service and the Cheap Heat System is a 5000 watt and works on 240 volts. This system is very well built and runs quiter than the gas unit. Good luck in your adventures to keep your camper heated.