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Temple NH 10 foot yurt RMH - assorted questions  RSS feed

 
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Hi - I am building a rocket mass heater in a 10' diameter yurt in New Hampshire.

I played flute too much this summer (Grasshopper and the Ant) - now its getting cold - and I am trying to build a mass in the forest - ha ha.

Was wondering about putting magnesium chloride in the cob mixture to help with freezing. (a friend said that's what they do with concrete.

Also - wondering if there is a preferred orientation for the seam in the 6" stove pipes in the mass.

I will tell the story with pictures (a comedy of learning) but for now I would like to know if anyone has any ideas.

Thank you,

Karl
 
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Location: latitude 47 N.W. montana zone 6A
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cat pig rocket stoves
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Hi Karl;  Welcome to Permies!

The seams go up on the pipes. Be sure to bed the pipe well in cob and surround it completely with cob.

I would guess adding calcium chloride might be ok... maybe. That's what they use as a dust control on gravel roads.  It is a moisture attractant though, not sure if that's such a good idea.

A better way would be to have a stove burning. Either build your core and plumb the exhaust thru the mass area. Then cob as you burn OR...

Have a small box stove in your yurt that will keep your cob warm enough to build with.  Its going to be rough but you can do it.  As soon as possible start burning  your rmh core and piping , cob and rock lasagna  your mass, heating every day.

By the way ... Got DRY wood yet ? You will need it.

Looking forward to photos
 
Karl Wilson
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Hi Thomas,

Thanks for the instant reply - very helpful. I built a rudimentary rumford into the wall which works great for heating me - so hopefully that will help. I built a mass quickly and in a bit of a panic - and think I got the mix too wet - so I am deconstructing. I was curing the mass with my old rocky estufa - piped into the mass - I think that combo will work - good thought on the salt attracting moisture - I think I will give it a miss. Thanks for the seams up info. I will send pictures and the story once I can say "I did it" rather than "I'm gonna do it"!

Thanks again, much appreciated.

Karl
 
Karl Wilson
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New topic - Is pine a legitimate primary fuel source - seems hardwood is preferred.

A friend of mine is having two large pines cut down - and I am looking at them thinking - hmmm - that could be ten years of fuel for free rather than paying for disposal. Big logs which I was thinking I could stack outside as a wind break and then use as needed. (of course won't be dry yet - so maybe next years fuel - though pine seems different (less water - more sap).

Tried searching the forum but have not found a definitive answer.

on a side note - I cut my had pretty badly - spent a night in the hospital (note to self - do NOT put your finger in your mouth!) so all my clay froze - but it has given me time to revisit the videos - and my book arrived the day after so I read the whole book in the hospital (both doctors were interested in the project) - so the delay is going to end up being a good thing - though frustrating....

Also trying to type without a left index finger is challenging so sorry if I have a weird stilted style - ha ha

Thanks,

Karl

 
thomas rubino
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Hey Karl;
Pine is fine as long as it is dry.   Splitting it down early and stacking as a wind break is an excellent idea.

Normally I burn Red Fir, this year I'm burning pine.  Only difference so far is the pine seems to leave more ash in the burn tunnel than the fir did.
 
I agree. Here's the link: https://richsoil.com/wood-heat.jsp
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