Last one to post in this thread wins!

Ahoey said

Used propane “pigs” big tank. To heat hordings they usually have a strap on heater to plug in when the temperature drops.

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Makes sense. I think consumption rate has a lot to do with them freezing up too. Not sure about the physics just personal experience.
I think a 5000 watt generator is more forgiving than a 100,000 BTU torpedo.