Results of the 8" batch box thingy at the Innovators Gathering

Just want to say if you work Ceramic Fiber Blanket into the build that the stove will be more efficient and burn hotter!?

in the first post on this thread there is a layer by layer layout - the second layer is a white board - what is that board made out of? it looks like the door is also made of this material (at least it is looks like a white board) - is this the same?

If I remember correctly, it's 1/2" ceramic fibre board. The makeshift door was also out of the same material. This type of board tended to shrink quite  a bit, the bottom layer is probably up for replacement right now and other parts as well. This experimental heater is in function since september 2014.

Edit:
The white material turned out to be calcium silicate board, I just checked my posts from back then. At present, I'd regard this material as "handy to experiment with" but by no means suitable for a permanent installation. The door gave way a long time ago but there are more parts in there of the same material. Of course one could choose to use it anyway and do a rebuild every 5 years or so.

A look at the rocket mass heater that was before in the classroom:

Bump to these thoughts, I am curious always about four year old review of said materials.

Anyone here with an opinion about calcium silicate board  used in these ways?  Even if only 3 to 5 years efficacy,  are they safe to use without respirator and hazmat suits?  I am reading some results, but often the serpent lurks in that tree of life...

Traduction

Hello Peter and everyone,

You have been a great help to me in planning the batch box through all your correspondence. I have various constraints, including my wife — and that’s why the design ended up looking like this.

The 8-inch oven is made up of a large bell and a small bell, with a bench/seat area between them. The bench cavity is 25 × 50.
There is 10 cm of cob above the bench for thermal mass. Is that okay, or would you recommend doing it differently?
And is it better to use solid red bricks or hollow ones?
I’d also appreciate a drawing of a door with the secondary air inlet built into the door. Which option is better: having the air enter through the door, or using a P-tube?
According to the principles and guidelines I’ve read here, this should work. I’d really appreciate it if you could take a look at the design and give me your feedback — what might not work, and what could generally be improved.
https://drive.google.com/file/d/14wmGa47VnEhuuNxTmol3lN5YdXImNGi6/view?usp=drive_link
Thank you very much!

bags bani wrote: I’d really appreciate it if you could take a look at the design and give me your feedback — what might not work, and what could generally be improved.
https://drive.google.com/file/d/14wmGa47VnEhuuNxTmol3lN5YdXImNGi6/view?usp=drive_link

I tried to look (not that I can offer any advice, I just wanted to see what it looked like that your wife found acceptable) but it said that I didn't have access. Could you change the settings?

've granted access—sorry.

bags bani wrote:Hello Peter and everyone,

You have been a great help to me in planning the batch box through all your correspondence. I have various constraints, including my wife — and that’s why the design ended up looking like this.

The 8-inch oven is made up of a large bell and a small bell, with a bench/seat area between them. The bench cavity is 25 × 50.
There is 10 cm of cob above the bench for thermal mass. Is that okay, or would you recommend doing it differently?
And is it better to use solid red bricks or hollow ones?
I’d also appreciate a drawing of a door with the secondary air inlet built into the door. Which option is better: having the air enter through the door, or using a P-tube?
According to the principles and guidelines I’ve read here, this should work. I’d really appreciate it if you could take a look at the design and give me your feedback — what might not work, and what could generally be improved.
https://drive.google.com/file/d/14wmGa47VnEhuuNxTmol3lN5YdXImNGi6/view?usp=drive_link
Thank you very much!

Here is a more advanced file.
https://drive.google.com/file/d/166Q8tOiYlmlK0hIM28KlhH_aaVESzccx/view?usp=sharing

Tried to see this, but not granted access, you may want to change settings