(1/31/2012 update at bottom)
Most of the heat in my house is generated by a wood stove which burns three or four cords of wood a year. When the temperature stays below 20° F for a few days, I let the thermostat turn on the oil furnace for three hours in the morning to take the chill off, but I rarely use the furnace to heat the entire house all day long. I also have a propane space heater in one room that runs on most winter days. Propane is also used to heat water and for the kitchen range, and I use about 350 gallons per year.