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beautiful rocket mass heaters

 
steward
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Figured we needed to start a thread dedicated entirely to pictures of beautiful rocket mass heaters. Feel free to share any beautiful ones you find!


Richsoil


Richsoil


Ernie's Pics


Fire Speaking


Autonomie


Estufas de Masas


http://rocketstovestuff.wordpress.com/about/


Sun Dog Builders


Fire Speaking


Ben's Natural Building


NaturalHomes

A really pretty masonry heater which from my understanding is very similar to a rocket mass heater so I just had to add it.

LehmundFeuer

Again, feel free to post more pictures of beautiful rocket mass heaters to this thread!
 
pollinator
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Cassie L. : Just so you know, Ernie W. Lusts after the 55 gallon Barrel in your 3rd picture correction 4th picture !
 
Cassie Langstraat
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Ha, what exactly do you mean by that Al?
 
allen lumley
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Cassie L. : I mean it would be a very dirty trick to call him up and tell him you were shipping him one if it were not absolutely true,

Kind of a Bucket-list thing to Make another RMH using that barrel, 70 years old if it is a Day !

While I am back here to answer your question. The photo on the cover of the 2nd Edition of Rocket Mass Heaters needs to be there

For the Good of the Crafts ! Big AL
 
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I'm sorry to say, but this one looks like toilets

http://www.inspirationgreen.com/assets/images/Blog-Building/Rocket%20Heater/juured.ee.jpg

But i love this bench.



 
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allen lumley wrote:Cassie L. : Just so you know, Ernie W. Lusts after the 55 gallon Barrel in your 3rd picture correction 4th picture !



Ernie says it is a nice barrel, and someone has polished it up pretty, but lust would not exactly be the word.
He favors them covered in canola oil and basking in the heat.

-Erica
 
Erica Wisner
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Satamax Antone wrote:I'm sorry to say, but this one looks like toilets

http://www.inspirationgreen.com/assets/images/Blog-Building/Rocket%20Heater/juured.ee.jpg

...



I can't follow that link, but here's an article which has a lot more images (and presumably, the above accused as well!)
http://www.inspirationgreen.com/rocket-mass-heaters.html
 
allen lumley
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Erica : Say hello to ''the elderly naval man'' for me, and tell him he has Mellowed ! Glad that he is getting around much better ! A & M
 
Cassie Langstraat
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Here are some RMH photos photographer Adi Segal sent us. Her website is here and her facebook page is here!









 
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do all rocket mass heaters have to be covered in cob? (I'm not being a smart ass I just want to know what other materials would also work in case cob wasn't handy).
 
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Betty Lamb wrote:do all rocket mass heaters have to be covered in cob? (I'm not being a smart ass I just want to know what other materials would also work in case cob wasn't handy).



Cob is not mandatory, but works well on multiple levels. Good density for holding heat, makes for a good seal/barrier around the duct work to assure you don't get gasses venting into living space. Paul Wheaton has experimented with a gravel mass with a portable RMH. I built one last year where I used cob to seal joints and make the burn chamber and feed tube, then buried the duct work in sand, because sand I have in abundance, but clay I have to buy.
 
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Betty Lamb wrote:do all rocket mass heaters have to be covered in cob? (I'm not being a smart ass I just want to know what other materials would also work in case cob wasn't handy).



That depends on one's vision of the RMH. From a technical view, no. The mass could be other things besides cob. There are some that are made of all bricks (either high heat or common clay) and no metal parts or cob at all. Some people however, would feel a line has been crossed and the heater is now a masonry heater even though it uses the same principles in it's operation. Historically, The RMH has been a masonry heater that is made from found objects rather than bought materials so that one might have a very good masonry heater at a hundredth of the price of even an entry level masonry heater made of brick by a mason (about 10K CAD the last I heard). Personally, I would consider this a RMH:

Most would call it a contraflow masonry heater, but the riser is much smaller (and squarer) than the normal contraflow. Yes that is a high mass bench off to the left. Here is the build process:

Building the gymse

It shows the riser size and also the designer experimenting with running the flue down hill to exhaust.

That is probably on the very outside tip of what might be considered a RMH, there are many more examples of RMH made from brick that are more traditional in shape and operation.

From the masonry heater side of things (just to muddy the water), Alex Chernov designed a masonry heater that he felt could be built for a similar price to the original RMH and work just as well or better (every designer feels their design is better after all). He calls it the Russian Rocket. It uses the same number of fire bricks the RMH does, and then common bricks. (all of which can be scrounged for free if one is in the right place at the right time... I have a pile of fire brick I got free from a demo) In this article he uses masonry heater mortar, but he suggests a clay/sand mortar made much the same as cob could be used too.

Here is one built of all on site materials. Hand made adobe bricks and cob.
Here is another built inside a building.

As you can see, the field of high mass heaters is very broad and the RMH is just one corner of it. What seems to be happening as work is done to make the RMH a viable option for a home owner who requires a permit, is that the cost of the RMH starts to approach that of the masonry heater. Where they can be used at little expense (any high mass heater) seems to be where building codes are not a part of the equation.

In the end, the RMH needs to be built of something that can take the heat and provide a large mass, all while being safe(I would insert healthy in here too) to use in a dwelling.
 
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Betty Lamb wrote:do all rocket mass heaters have to be covered in cob? (I'm not being a smart ass I just want to know what other materials would also work in case cob wasn't handy).



Absolutely not, but you can't have a RMH without some mass. So rock, gravel, sand, clay, brick, earth, water will all work to a degree, even wood with insulation from the initial heat. Cob isn't suggested for fun, it's just a proven mass, it might be better or even worse than other forms of mass.
 
Len Ovens
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Rick Howd wrote:

Betty Lamb wrote:do all rocket mass heaters have to be covered in cob? (I'm not being a smart ass I just want to know what other materials would also work in case cob wasn't handy).



Absolutely not, but you can't have a RMH without some mass. So rock, gravel, sand, clay, brick, earth, water will all work to a degree, even wood with insulation from the initial heat. Cob isn't suggested for fun, it's just a proven mass, it might be better or even worse than other forms of mass.



Notice the lack of the word "concrete". Concrete, like wood, could only be used once the flue gas cools below 600C other wise it crumbles. There is refractory concrete out there which would be ok... but most of us don't like concrete anyway

As you might (or not) guess, the use of portland cement in the mortar is also a bad idea. To add to this issue, even using concrete/portland cement in cooler parts of the design can pose problems as it doesn't seem to interface very well with clay based materials. So there is likely to be cracks develop over (probably not very much) time which would let flue gas into the dwelling. It is a good idea to overall, use materials the expand/contract at the same rate with temperature change. Most high mass heaters are therefore built with clay based materials to match the firebrick in the core.
 
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I found this fireplace screen that I would like to use on my (future) RMH. I tried to post just an image but I'm doing something wrong.....


http://demandware.edgesuite.net/sits_pod20/dw/image/v2/AAID_PRD/on/demandware.static/Sites-pier1_us-Site/Sites-pier1_master/default/v1416509402050/images/2855727/2855727_1.jpg?sw=1500&sh=1500
 
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Here's the iimage. Right click, copy img url, paste it in the little box that comes up when you cick the Img button when you write a post.

 
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Hi permies,

There are some nice pictures in this thread.
I like cob, but I'd also like to get rid of the barrel. (a cooking plate is fine)
I don't like the looks of the barrel, plus I imagine it is probably too hot to touch and thus prone to accidents.

I understand that the functions of the barrel are many. It works as a radiator and cools the gasses quick enough to create downwards pull. (Both reasons, why I can't simply cover the barrel with cob)
My question: is there any development going on, to design a rmh without the barrel? (A nice - no mentioning of a barrel in "rocket mass heater", thus we could even stick with the name)

(still a DIY version, lots of reading doesn't hurt)

--- Ludger
 
Satamax Antone
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Ludger Merkens wrote:Hi permies,

There are some nice pictures in this thread.
I like cob, but I'd also like to get rid of the barrel. (a cooking plate is fine)
I don't like the looks of the barrel, plus I imagine it is probably too hot to touch and thus prone to accidents.

I understand that the functions of the barrel are many. It works as a radiator and cools the gasses quick enough to create downwards pull. (Both reasons, why I can't simply cover the barrel with cob)
My question: is there any development going on, to design a rmh without the barrel? (A nice - no mentioning of a barrel in "rocket mass heater", thus we could even stick with the name)

(still a DIY version, lots of reading doesn't hurt)

--- Ludger



http://batchrocket.hostoi.com/html/foto.html



http://technologieforum.forumatic.com/viewtopic.php?f=19&t=27


http://donkey32.proboards.com/thread/1316/20cm-batch-rocket-stove-monster



http://donkey32.proboards.com/thread/848/18cm-inch-double-batch-system


http://donkey32.proboards.com/thread/1330/story-bells-20cm-batch-proposal
 
Ludger Merkens
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Thank you - Satamax Antone

my 'Nederlands' is more than rusty, but it looks as if I have to do lots of reading on 'donkey' now.

--- Ludger
 
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Oh my goodness would you look at that stunning RMH the 3rd picture down with the oven or warmer in it.! I tried to find more photos of it to see how it's constructed but no luck. Can anyone help with more photos? Information? Anything?
 
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My first cob! This is a 4" rmh with barrel made from an old electric water heater. In this photo it has just been completed and is still wet. After drying the surface was a little rougher than I wanted, but I still think it's pretty.
IMG_0163.JPG
[Thumbnail for IMG_0163.JPG]
4" rmh, my first cob!
 
allen lumley
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Jesse Twinn : I Googled ''Rocket Mass Heaters Pictures'' The use of the word 'pictures' or 'images' is like having a smarter search engine parallel to the regular one.

The original picture in this thread was labeled 'Ernies pics' this is what I came up with ! Link below :


https://www.pinterest.com/pin/271764158736365303/


From this side you can see the old cookstove it encases !

For the Good of the Craft ! Big AL







 
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I forgot about this thread until today, but I finally get to post my stove!!!
rmh.jpg
[Thumbnail for rmh.jpg]
 
Cassie Langstraat
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Oh my god Daniel, That is one of the prettiest ones I've seen! Thanks so much for posting!
 
Daniel Ray
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Thanks! It was my first one I ever built. My wife and I actually built the RMH and bench first, then we built the house around it. I managed to squeeze in 30' of horizontal tubing before taking it outside. It's running like a dream now, wish I could have made it to wheaton labs for the rmh demonstrations.
 
Cassie Langstraat
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Daniel Ray wrote:Thanks! It was my first one I ever built. My wife and I actually built the RMH and bench first, then we built the house around it. I managed to squeeze in 30' of horizontal tubing before taking it outside. It's running like a dream now, wish I could have made it to wheaton labs for the rmh demonstrations.



I love it! What is the house made of? Have you posted any other pics of your building process (of the house or rmh) on permies? I'd love to see more of it!
 
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The house is made of cob. You can check out our blog at montanacobcottage.blogspot.com where we recorded the process.
 
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Daniel Ray wrote:You can check out our blog at montanacobcottage.blogspot.com where we recorded the process.



Daniel - you'd be more than welcome to have your own thread here showcasing your work. You can also add a live link to your signature guiding people to your blog. I suspect traffic to it will increase substantially if you did those things.
 
Cassie Langstraat
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Gary Goodridge wrote:

This is rather beautiful. Any idea how much something like this would cost?



Absolutely no idea. Lol

Anyone else know?
 
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Built by a professional to code? Somewhere in the $10-30,000 range I would suspect.
 
Len Ovens
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Glenn Herbert wrote:Built by a professional to code? Somewhere in the $10-30,000 range I would suspect.



10k will get you in the door with a mass heater to code. This one would be closer to the high end.
 
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Sauna rocket (there is a mass heater under the wooden bench, and the feed access is from the changing-room adjacent)
from off-grid life, ben's natural building, or some such blog.

Here is the whole project: http://bensnaturalbuilding.blogspot.com/2013/02/rocket-mass-heater-designbuild-workshop.html

They had a 140 degree sauna, left the vents shut since it was 15 degree weather outside (or was it -15?). The room was still holding at 110 the next day.

-E

 
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Discussion of these stoves at the rocket mass heater workshop jamboree

 
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Len Ovens: “Some people however, would feel a line has been crossed and the heater is now a masonry heater even though it uses the same principles in it's operation.“
Are you meaning same principles as RMH, or same as masonry heater?
I’m barely at novice level for knowledge about either of these, but from the masonry heaters I’ve seen (Russian Fireplace, etc) the principles don’t seem to be the same, aside from heating a mass. The masonry heaters appear to be a firebox beneath a zigzag flue which eventually exits a vertical stack as cool gasses (co2, h2o). The mass has time to absorb the heat, but is there a high temp and/or secondary burn such as occurs in the RMH? The one I knew the most about was built by an ‘old country’ German couple, and they ran a hot fire for about 3 days, then the entire mass was warm and they built daily small fires to maintain that level. After the initial burn it didn’t use much wood to heat their large chalet style house, but the heater was probably 6’ square and occupied the center of both levels. I did various work for them in my late teens, and learned early the value of thermal mass.
 
Len Ovens
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Julie Reed wrote:Len Ovens: “Some people however, would feel a line has been crossed and the heater is now a masonry heater even though it uses the same principles in it's operation.“
Are you meaning same principles as RMH, or same as masonry heater?
I’m barely at novice level for knowledge about either of these, but from the masonry heaters I’ve seen (Russian Fireplace, etc) the principles don’t seem to be the same, aside from heating a mass. The masonry heaters appear to be a firebox beneath a zigzag flue which eventually exits a vertical stack as cool gasses (co2, h2o). The mass has time to absorb the heat, but is there a high temp and/or secondary burn such as occurs in the RMH? The one I knew the most about was built by an ‘old country’ German couple, and they ran a hot fire for about 3 days, then the entire mass was warm and they built daily small fires to maintain that level. After the initial burn it didn’t use much wood to heat their large chalet style house, but the heater was probably 6’ square and occupied the center of both levels. I did various work for them in my late teens, and learned early the value of thermal mass.


Yes I would say that any masonry heater builder today uses the same principles as the RMH. First set aside the the bench or other heat storage part of things as that is not what makes a "rocket" mass heater. What makes the rocket is the first stage to the bottom of the barrel. There are many batch box RMH designs these days and that seems to be the direction things are going. But both RMH and the masonry wood heater have the next portion, the riser where the flue gases are squeezed through a tube with a cross section similar to the exit flue to increase the velocity of the gases and finish burning the unburnt gases at a high temperature. In both cases this part of the rocket is fully enclosed and so not visible from the outside of the heater. Then the gas is redirected down around the rocket to almost the bottom of the heater in both cases and as the gases cool, they shrink and are pulled through partly by gravity (we think... at least that is the most common explanation in the RMH community that I have heard). After that comes heat removal by running the flue gases through mass. Both RMHs and masonry wood heaters do the same thing. Quite often these gases are run through a mass in the shape of a bench for heated seating. In the case of the RMH the bench is always used, probably because cob provides the best structural properties when used horizontally and because RMH are often built by amateurs who would like to avoid rebuilding the foundation to support the weight. Masonry wood heaters are most often installed by professionals who are going to add to the foundation anyway and their concern is how would the client like their stove to be. The clients on the other hand may want a more compact design with no bench or of lower price (10k CAD gets the cheapest build, but most even low end heaters are 20k and up) and so the mass is more vertical. But the thing that makes a rocket anything is the heat riser inside which acts as an internal chimney to both create draft and finish the burn. Both types add preheated air to the riser though not always intentionally. In my experience, intentionally works better. Most masons seem to agree from what I have seen.

Do note that not all  masonry wood heaters follow the exact same principals as the RMH, some are more like fireplaces in operation. However the particular model I showed in the message you quoted has pretty much the exact same flue gas flow as the RMH and even uses very similar kinds of dimensions all the way through. If you look through some of the rest of the threads here about RMHs, you will find some here that are even less like the original RMH than the one I showed. Look at the Walker style for example where the "riser" is horizontal   To some people The RMH has a barrel or it is not a RMH and you will not change their mind. I am ok with that too. In my case functionally the same is what is important.
 
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