Every application will be different, every stove will have it's requirements.. As a general rule: The burn tunnel should be as short as possible. I believe the book says that the burn tunnel should be no more than half as long as the heat riser is tall.. We figured that out pretty quickly. I've seen longer that all that work ok, but I think it's inadvisable. Shorter is better.
The heat riser should be as tall as you can get it within reason. Though it seems that taller than 2 1/2 to 3 feet is unnecessary. It all depends on how well insulated the works are how long the burn tunnel has to be and all that.. Again, I'd say only as long as it needs to be and no more. Too long and you will be loosing heat to the stove, too short and you won't create enough heat to burn all the fuel and provide draft.
The (effective) heat riser height should be measured from the top of the wood feed (air intake), so you will want that as low as possible.
joel: Daryl, they are just a box and a heating element. most folks here in alaska that build themselves one, just knock together box from 1x material and put a camp stove on the ground. much safer to use an electric burner and cast iron pan yo put chips in
Jul 10, 2015 23:17:56 GMT -8
Daryl: Howdy, Joel! I wish I could 'like' your comment. I usually build brick boxes to smoke food because I love the even temps of clay and how it stores the heat. But yeah, if I throw something together, then I could use a metal box of some kind with coals.
Jul 11, 2015 5:58:05 GMT -8
ericvw: Last full day at Corolla, NC... Back to work on Monday!
Jul 17, 2015 6:11:04 GMT -8
Daryl: Perfect beaches...but hurry back Eric
Jul 18, 2015 11:14:58 GMT -8
ericvw: I'm (we're) back. Shoulda stayed home and saved the $... I enjoyed the ocean more than her family. But that's ok. I grew up on LI, so water is my friend!
Jul 18, 2015 14:55:55 GMT -8
Daryl: Eric is back! Yayyyyyy!
Jul 19, 2015 9:45:49 GMT -8