The home's heat comes from a highly efficient wood-burning stove from Rais. Though wood burning is banned in Boulder, the sealed firebox can be used year-round, with combustion technology so effective it's said to release less carbon dioxide than decomposing wood. After logs burn down to embers, the stove continues to radiate heat for hours, reducing the amount of kindling required to keep the place warm.  Photo 7 of 9 in Post Bale