bought a Sunbeam ceramic heater at Walmat for about $20. Worked like a charm for daytime warmth during 20 degree cold and winter winds in Montana last week. Saved the propane for night time heating. Someone was in the trailer during use and we did not notice any overheating of unit, cord or plug. Thanks for the good word on using a ceramic heater. We had not tried one before, but are sold on it now.