Gyula Kósa

Jose Teixeira wrote:Have you built the rmh? How were the results?
Hope its performs well as i intend to use a quite large double glazed insert door too. I realize it s not the best in terms of insulation but will be a compromise with aesthetitcs...

Unfortunately I felt it too risky to build it myself. I contacted some contractors, but none of them was available/comfortable with building a rocket stove so finally we decided to request a contractor to build a tile stove like this.

Hi Mike,

You see it right - the chimney goes on the path you described!

The wall behind the heater is a 40 cm thick solid brick interior wall.

That's a good question if insulation or air gap is required and how such side of the bell counts to the internal surface area.
The guys in Portugal built the bell just beside the wall. Moreover that seems to be an exterior wall.
I'm not sure if Peter's red heater made entirely of cast parts has or has not got any air gap: on one picture there seems to be a 10 cm gap, while on the final picture the heater looks like it is placed to the wall.

I shall probably consult with the structural engineer how much heat and temperature is that wall allowed to be exposed to, and from what distance.

The heater is more or less in a pathway in the hall. I would like it to offset out of the wall as little as possible hence the rather small depth and wider bell. From the point of the RMS it might be a little bit disappointing because such geometry has smaller volume than a usual quadrat-based bell with the very same ISA. Smaller volume -> faster gas flow -> less time for the gas to transfer heat to the mass.
A ball-shaped bell would be more ideal in this respect I believe.

- Gyula

Hi Glenn,

Many thanks for adding the sketch! It seems to me that in my original post the engine of this forum does not load images from HTTPS links, only from HTTP.

Yep, the door would be on the right side.

I was also thinking on extending the bell space. The question will just be how to support the mass above the firebox. I'm not sure if welded frames for the window and door will hold enough.

Gyula

I would like to mimic the look of the following fireplace. At the same time I would like to use all of the advantages of a Peter van den Berg type batch box RMH (efficiency, heat storage etc.):


https://drive.google.com/file/d/1wU9tnKx3JqboUu6jxkLkxdylOCcCoHMH/view?usp=sharing

What is your opinion about the following sketch of a batch box RMH with an external side winder combustion unit with glass walls on its three sides, please?


https://drive.google.com/file/d/1LnEO9DtpyHC0FmivZP_Q3hJJnska4kj6/view?usp=sharing

The scales/proportions on the sketch are still just drafts. Especially the height should be much larger in reality.

In order to preserve heat in the combustion unit as much as possible I would use two layers of Robax glass perhaps with some distance in between them.

Most likely the glass walls & door will have to be custom made. I have not found any suitable one on the market yet.
This one is closest:


Many thanks.
Gyula