You'all are smart to plan ahead. Last year we had a power outage when temp was down in low 20's and I was never so miserable. I live in a small house with a crawl space, wood floors, never thought about how cold it gets, I have always lived in a house on a slab and had a gas fireplace. But in the country we seem to loose power a lot. I am going to have to think about propane heater.