Eric Hammond wrote:As Caleb suggests, it HAS to be a chimney issue or clearance issue between the "barrel" and heat riser. The current barrel situation in the picture is terrible. You need to be able to get in there and inspect/clean. You've basically made a permanently installed barrel. What did it look like before the barrel was installed? If the chimney is ok, that barrel needs to come off.
thomas rubino wrote:Hi Jay,Welcome to permies!
We need better pictures and more info. What I can see is) it appears your feed tube is only 3 bricks tall ? That's only 12-13" tall, should be around 16". If it's too short the fire will want to draft up it, instead of your riser. How long is your burn tunnel roof ? Should be around 12"
What is your chimney like?
Eric Hammond wrote:If I were to do it over, I would make the gap as large as I could and still maintain a 36 inch clearance between the top of the barrel and the combustible ceiling. Seems like that gap should be as large as possible.
thomas rubino wrote: mine has been 2.5" for 5 years now.