Saw the other similar post but I am actually asking about space heaters for the garage. I have 2 boys aged 12 and 9 and a 12 foot garage in my 2014 Voltage with one heat vent. Have not camped with it ...
I have two Vornados to augment the furnace but we are hooked up all winter. No way I would go near any open flame unit- I should go to an oil filled unit since we are hooked up but I had the Vornados for dry camping... Very comfortable in the trailer down into the single digits with the two electric heaters.