propane can be found all over. Small containers of propane used for tailgating grills, small heaters and torches can be found at hardware stores and even walmart. larger tanks that are refillable can...
I get mine in exchangeable 5 gallon containers and also delivered by truck to my 1000 gallon tank behind the house.
Propane is a pure substance, a compound with the formula C3H8
How much wood can a woodchuck chuck? Same question.
Furnace it has to reach much higher temperatures than the fireplace