DeLonghi Hot Oil Electric Heater
I have been a fan of the DeLonghi hot oil heaters for some time. They put out the same heat as all the other electric space heaters, 1,500 watts, cost less than $50, no noise and nothing gets red hot.
I ran across another DeLonghi heater that looks like it was just made for our 66 Tradewind. It is smaller than the standard "radiator" type DeLonghi heater, with an output of 1,200 watts, is shorter, 15" vs. 26", wider 18" vs 14" and looks kind of like an Airstream, at least to me.
I say it is made for the Tradewind because if you close the bathroom door and the door to the front living area, you are only heating an area with about 40 sq ft of space. I suspect this heater will be fine down to 32 degrees or even lower. It is more expensive than the larger heater because it has a timer and they don't sell as many. It works well for us if you have hookups and it is not too cold out.
I would also add that it is a more stable heater than the larger "radiator" type heater since it is shorter and is not on wheels.