Well we've had some cooler weather so I got to try out the new furnace. I must say its impressive with heat output and its clean burning capabilities. I've used 3 med splits to carry me through the night with coals in the morning in the mild weather we have been having. Wood consumption will be much less from what I have seen so far. When winter gets here I will keep an update on this furnace. Its operation is completely different than the old furnace. Well I have made a video to show the secondary combustion of the furnace. It was dampered down fully in the video.