posted 8 years ago
Unfortunately, youtube videos are notoriously unreliable sources of information. Just looking at the photos, it appears that the heat riser could not be longer than twice the feed tube height, when recommended ratios are three or four times the feed tube height. Based on this plus the probably long burn tunnel, it would not be likely to work very well without a tall, well-insulated chimney. Also, the heavy metal construction would draw significant heat away from the combustion and diminish the efficiency and completeness of combustion.