A wood stove is one of the heat sources for this home. 

The rocks behind the stove were gathered on the property, and act as a heat collector.  The wood bin beside the stove stores 1 weeks worth of firewood. 

Rocky burns less than 2 cords of wood during an entire winter.   A Montana winter has lows below 10 degrees and highs in the low 30s... Brrrrrr.