I am looking at a used keystoker koker stove, it looks like its in pretty good shape. My house is only 1500 sq ft and the stove output is 160000 btu. My furnace is 80000 btu and heats the house fine. I don't have any experience with a stoker stove. Will this stove burn low and produce much less btu's? If so is it inefficient burning it this way?