Glenn Herbert wrote:Looking good so far! You will get even better draw if you make the heat riser taller, ideally 3 to 4 times the height of the feed tube from the burn tunnel floor. Laying the riser bricks up on edge will get you more height while reducing the mass that has to heat up before the draft gets to its best.
Destiny Hagest wrote:I'm not sure which videos or books you've read on the subject, but there are a lot of great learning resources out there that you can just soak in to help you get through this project - I find the more I understand something, the easier time I have working on it.
Ernie and Erica just released their Rocket Mass Heater Builder's Guide, and Paul's brand new DVD set, Better Wood Heat: DIY Rocket Mass Heaters is also now available for preorder. That one's kind of nice, because it shows you both a cob and pebble style, and also goes into the inner workings of the core of the RMH a bit more.