Currently in my house I have only one heat option which is propane forced air furnace and the operating cost is outrageous. I am trying to figure out what would be the best option for a wood stove or furnace would be. My house in on the larger size. It is 35' X 70' and a very open floor plan. There is a full basement under the house also that is completely unfinished but stays fairly warm because the walls are a foam core form. It is foam on the inside and outside of the cement wall making the walls about 14" thick. The floor is a bit cool but stays pretty warm even though there are no vents down there from the furnace. My thoughts are putting the wood stove near the center of the basement and letting the heat rise. There are actually open vents that are in each room to the basement as they where suppose to one day be plumbed into the gas furnace for a cold air return. Would a large wood stove put enough heat upstairs to heat it or would it be better to put the stove on the main floor. Or would an add on wood furnace plumbed into the existing pipes be the best option for my large house?