I have been thinking of something in this line too. I have a place in northern WIs. and it takes 4-5 hours to make it comfortable in there when it is 30 degrees. I wish I could warm it up faster. The only other thing I can think of is propane or electric but we are not on the grid. Maybe an hour of propane heat would help but I am afraid it will stink. My son is so sensitive with is asthma I think it will trigger an attack. He is just starting to not need breathing treatments in the cabin.

But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23