One important one is that to get the exhaust to draw after the horizontal duct went all over everywhere, (heating the arc shaped bench at the perimeter of the teepee, then under part of the floor) is to bring the exhaust duct past the heat source as it rises to go out. This concept was discussed at the pyronaut's event last October. Apparently at least 2 of the experienced rocket stove gurus had come to this innovation independently of one another.
Depending on your summer weather, you might want to design cooking capabilities into the building where you house your rocket stove, so that you don't heat your house up with summer food preparation and preservation. It might turn out to make your ger more roomy and habitable to have this second room. Is it possible to make it so that you can go between the two without going outside? I mean a sort of two room ger, connected gers? Maybe the kitchen could be in the RMH room, (and the firewood too?) freeing space in the main ger for other functions.
How stable is the weather where you are building? Does it get cold and stay cold, do you have cold nights and warm days, does it fluctuate without warning?
The more you can rely on needing heat consistently, the more a larger remote system will make sense. The California yurt has a huge firebox and barrel, and is probably considerably oversized for the space; thus it easily gets too hot. You could make a smaller system inside your yurt and be able to control the fire closely to fine-tune heat delivery. About half of the heat from a standard RMH is released from the barrel as instant radiation, and half is stored in the mass for timed release.
Glenn Herbert wrote:If you can join the entrances of the main yurt and the RMH enclosure, and you would want to be cooking frequently in the main yurt, I could see having the RMH semi-remote. You would want to build a batch box style so you could load it and let it burn, instead of the frequent tending a J-tube would need. The batch box does reportedly require a good chimney at the end, so what you might do is run the mass ducting from the barrel looping under the main floor and back, then rising beside the barrel to the termination. This would allow you to put in a bypass for easier starting, and also to run the RMH for cooking in the summer without heating the floor. If the terrain allows, putting the RMH room a step or two down from the main floor would make drafting easier (less downward run for the ducting). It would also let the entry be lower than floor level, reducing cold drafts.
Rachel Dee wrote:
I like that the more we talk about it, thinking about this or that detail, the more it becomes a plan that I can envision easily. 'll be sure to document the whole process once we get to building it.
The soil on the property is clay rich, and the sand available would be beach sand. We'll be visiting the property in the coming weeks, so I'll be able to know more then.
Thekla McDaniels wrote:
And about the clay soil and beach sand, do you know how to go about testing for clay content, and is the beach sand sharp sand or is it polished and rounded sand, and do you know about making test batches.
I guess I just should have asked if you have built with cob in the past. It is wonderful stuff and I love it but it's another topic to discuss if you have very little experience with it!
Thekla McDaniels wrote:Rachel, The two books I know of that explain in detail how to test the soil for clay content are "The Hand Sculpted House" by Ianto Evans (and others), and "Build Your Own Earth Oven" by Kiko Denzer. I used these books when I had no experience and they were helpful. There is a cob forum on Permies http://www.permies.com/forums/f-76/cob where people are talking all about cob.
Thekla McDaniels wrote: I had another thought, this one about your baby. My babies slept with me til they were about 1 year old. (easier nursing, no one has to wake up, get up, etc). The did not get a chance to kick the covers off! I know there are some people who have a "family bed" and everyone sleeps together.... It would certainly easy your mind about the little ones being warm enough, and people must have done it that way for hundreds of thousands of generations. It must be a viable option!
Glenn Herbert wrote: Polished, rounded sand is the worst possible aggregate. Imagine building something with marbles - if not for the glue, it would fall down instantly. Sharp, angular sand is the best, and is standard mason's sand.