Ruger, I too apologize. Wood chips here are free. Saw dust, just not the best solution in my book. Any bio fuel used in place of anything from the oil companies is good in my book. Saw dust off the floor( as well as bark, twigs, cut offs) goes in the furnace now, so don't see a need for a unit especially for that. Flippin a switch on to start the augers to fuel the furnace doesn't count as burning wood to me. This is a lifestyle, man. Seriously, I do enjoy people's new ideas and commend them for trying to bring them to market. It keeps the mind a workin.