After having my cheap ceramic cube heater catch on fire one day I elected to go with an oil filled “radiator” style. It’s a flat panel in a metal housing and does not get hot to touch. Mine cost about $100 at Lowe’s but I can leave it on while sleeping and not have a worry. I also wired in a dedicated outlet that I can plug into the 20A outlet on the camp pedestal and still have my usual 30A service available for regular duty.
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