Post by esbjornaneer on Oct 30, 2015 12:00:45 GMT -8
Cool that you are building right now too! I see you quoting in Euros... I hope you do not mind me asking where you are? I am building in southern Spain (1200m elevation). Great to see your progress!
I would leave an air gap ~5-10cm between any wall and the stove. And ideally insulate the wall of the stove too if it is towards an exterior wall. If you have to fill the gap you have between your wall and the stove I would go for something insulating if it is an exterior wall (sand of the options you gave) and concrete/cob or simmilar if you want to conduct the heat into the wall.
Your system is looking good. Esbjorn ps hope you like the edited version of the post.
Last Edit: Oct 31, 2015 12:17:51 GMT -8 by esbjornaneer: requested by thread originator
Esbjornaneer, i'm in southern france, in the alps, right by the italian border at 1500m of altitude. It would be very nice if you edited your message, and get a thread of your own, for the clarity of the thread. Thanks.
Last Edit: Oct 31, 2015 12:14:11 GMT -8 by satamax
Nice looking build you have going there Satamax. Is there not an expansion joint/gap between refractory firebox elements and the masonry side blocks? Maybe the photo doesn't show it, but normally there is left a small air-gap (about 3/16 to 1/4 inch) or the gap stuffed with similar thickness of ceramic fiber sheet material. Or maybe the expansion gap will be made automatically with the first firing?
Looking forward the the performance report of your new system.
Byron, i've left about 3mm each side. But will see how it handles heat.
I forgot to say, this thing draws like mad. I have 10.6m² of isa, plus the surface of the tube, which might be another m², and no hint of stalling with temp difference between outside and inside of about 5C° maximum in yesterday's try. Also, all joints are not tight yet. The door isn't, the side tank filling cap, which i've kept was also leaky, and the hole around the down pipe was not tight either.
Thanks a lot Trev. Well, it's a monster, i've already overloaded it today. Top window is all black. It's soo cool to see the flame out of the heat riser through that window. Now i'll have to clean It's a shame i won't be able to do anything till next weekend, i think. Real life gets in the way!
Guys and gals, Usualy in France, the gap between wood and chimney flues has to be 18cm. Seven inches or so. Would you think i could raise my top mass that close to the beams, or i risk scorching thoses? The more mass, the better realy.
Esbjorn, this is an interior wall, and i was hoping it would conduct a bit of heat to the other side! Nope, not working!
Last Edit: Oct 31, 2015 12:24:24 GMT -8 by satamax
Duh, the first bell burns skin! I was stuffing old firebricks between the two bells, dry stacked. I had gloves, but the sleeve on my left arm got caught on the corner, and rose up my arm. I touched the bare metal. Ouch that stings.
So, a little update. Since it snowed, and i couldn't do much workwise. I've stuffed more bricks in between the two bells today. And capped the first bell with two of the outer flue ellements. Filled with concrete and rocks. It's 265 kg more. so the whole contraption now weights more than 1300kg of mass, plus bits and bobs in metal.
My bottom part between second bell and firebox is warming up a smidge. I left a tube of cold acrylic caulking on top, and when i picked it up, i could feel the moisture which had condensated on the tube. Not dry yet!
I used a piece of air entrained concrete as a temporary top. Well, few days later, it has cracked. So now we know for sure, that air entrained concrete can't be even slightly structural in the firebox. I will repport, when i dismantle it, and check for strengh, with a screwdriver or something. I might look into cutting a cast iron top tomorow. I realy want to know if i can boil tea with this!
Ahhh, i forgot, there's a "party trick" i love to do with it. Open the top window, and tell people, do you see any smoke? Or even smell burning wood?
kkp: Mercedes: Benches don't get real hot. In fact, they are rather cool compared to other areas. You shouldn't need a mix like you described
Jun 7, 2018 18:10:52 GMT -8
maartenmartens: beste Peter, ik heb je eergisteren een mail gestuurd via het contact formulier op je website , heb je die goed ontvangen ? mvg Maarten Martens, architect - geobioloog (mail betreffende de bouw van onze eigen RMH)
Jun 20, 2018 13:21:57 GMT -8
martinm: any one here with info \ experience with heat (from a mass heater) distribution with ducts throughout two storey house ?
Sept 8, 2018 22:58:52 GMT -8
padica: Good morning, this is a wonderful subject, please someone can help me with the theme of double and triple combustion, how it is achieved, theory and design, thank you
Sept 15, 2018 7:13:40 GMT -8
wiscojames: I'm afraid you won't get a response to such a vague question - I suggest reading through some of the threads related to your questions before asking for an explanation. People will be very generous with their knowledge if your question is more specific.
Sept 18, 2018 4:48:00 GMT -8
daniel: in my experience as I am working now on something of that nature, I have thought of making a heat exchanger and distributing the heat through vents using a slower fan. Now after a few years I realize that mass heaters give out primarily radiant heat, for
Nov 30, 2018 12:48:38 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place...
Dec 16, 2018 18:10:49 GMT -8
vesuvius: High Temperature Glass options,
Jan 4, 2019 16:28:17 GMT -8
vesuvius: Do any of you have experience with using the glass from home oven doors on a rocket stove? I'd like to have a viewing port on my stove but don't want to fork out for new ceramic glass. Any thought as to whether it would take the heat of a rocket stove?
Jan 4, 2019 16:30:40 GMT -8
yaya: you dont need the blowair for that temp..
Jan 13, 2019 16:43:57 GMT -8
flybywire: Glass window from an old washing machine is designed to take high temps. Cheap solution to your need.
Jan 27, 2019 0:10:58 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place to have a discussion... it is for short announcements
Feb 7, 2019 0:11:23 GMT -8
coastalrocketeer: you won’t likely get replies to questions here, and it is not a spot that makes holding an ongoing discussion possible...
Feb 7, 2019 0:12:22 GMT -8
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8