Not familiar with the cheap heat system but it looks like a resistance coil which are not the most efficient electric heating system. We use an Eden Pure infrared heater and it does a great job for us, not sure if it would be adequate in temps in the teens but works well into the 30's. We use the furnace only as a supplement to the Eden Pure.
I prefer electric to propane as it is delivered right to my unit and I have to get the propane myself....
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