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Suggestions for outdoor fireplace

 
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Hello! I am currently studying sustainability at a school in Sweden. Me and my fellow students have have built a circular "outdoor room" with a fire pit in the middle. The room will eventually be covered in polycarbonate plastic (it has a "dome roof") and also most likely be covered with a hood/chimney to prevent any smoke from accumulating "inside" and to prevent soot from reaching the plastic roof.

What we want (most important on the top):
- A nice place for outdoor gatherings
- Warmth from the fireplace in the fall/winter/spring
- Possibility to cook food, boil/fry on the fireplace
- To use minimal amount of wood for the fireplace

What we have
- Firewood (twigs/branches from our garden/leftover wood from construction)
- A rusty J-shaped rocket stove
- Students with willingness to learn and ability to work =)
- Some welding skills and metal for construction

I have seem many designs online but haven't quite got my head around how they work or more sceifically how I can incorporate all/most of our "wants" for the fireplace using rms/rmh. If necessary we could have one solution for cooking and another for heating, eg a rms that is lifted into the center of the fireplace when needed, but that solution is not ideal.

See attached photos.

My questions:
1. In a rocket mass heater with exhaust going "up/down/out" - how would you get such fire started? Do you need mechanical venting to get it started?
2. Can I use the rusty stove somehow?
3. The rusty stove doesn't have any lid for the wood intake, is that needed? Most rocket stove designs I've seen has a lid on a hinge on the J-end of the stove.
4. Some j-shaped rocket stoves also has an adjustable lid on the air intake on the L-end of the stove, is that necessary?
5. The rusty rms has a loose part I cant figure out how to use, where would it go?
6. Can I safely try out the rusty rms? Is has only surface rust, no holes as far as I can see.
7. Why is the J-shaped stove so tall? Will the tallness affect the burning somehow?
8. Could I exctract heat from the rusty stove by adding say some piezo electric fans? Ok maybe not ideal outside but anyway.
9. Do you think rms/rmh is a good fit for us?

Any other suggestions/thoughts?

I am new to all this so bear with me, Thanks!
IMG-2884.jpg
Rusty stove made by previous students
Rusty stove made by previous students
IMG-2885.jpg
Rusty stove with unknown loose part
Rusty stove with unknown loose part
IMG-2886.jpg
Outdoor room with fire pit
Outdoor room with fire pit
IMG-2887.jpg
Ourdoor room with dome roof
Ourdoor room with dome roof
 
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Hi Emil,

Welcome to Permies
 
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