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Post by Orange on Feb 19, 2023 8:35:02 GMT -8
everyone is now installing underfloor water heating, I'm wondering why people are not hooking it up with rocket stoves like they do with with gas boilers, heat pumps etc. It's great because of perfect heat distribution and most importantly floors are large mass that don't require any space! Probably because wood heaters require maintenance.
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Post by Orange on Jan 9, 2023 10:41:44 GMT -8
a few updates for this season: CFB clay lining got peeled a bit in the riser so I painted it again (it's also coated with waterglass):
brick on the right started leaning inwards - as perlite is settling down it's pushing the brick so I tried to prevent that by adding tile on top but it didn't work. I also added the sloped bricks in the bottom made from air-concrete + tiles (for low mass). This also prevents side bricks from leaning inwards:
Sloped bricks are holding without issues, can't really say if combustion is better or not but the firebox volume is smaller, I have to clean ash after around 3 batches: Steel chimney also painted with clay, looks more natural and clay doesn't emit any VOCs (I hope):
welded some decorations for more pleasant look and I also want metal bell to disperse heat faster:
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Post by Orange on Dec 18, 2022 4:53:22 GMT -8
so green hardener peeled off, exposing CFB
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Post by Orange on Oct 26, 2022 1:03:01 GMT -8
The first obstacle was finding a vacuum formed ceramic fiber tube. Our US suppliers do not like small orders, and the "5 minute riser" option seemed like it was a bad choice that would be prone to collapse in the horizontal position no matter how you treat the ceramic fiber blanket. Finally found a supplier for a vacuum formed tube ($225 from Danser Inc for a 6” ID x 8” OD x 14” L, 2300F rating if anybody else is looking.) why would you want ceramic fibre when stove works well with standard refractory tube?
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Post by Orange on Sept 14, 2022 12:51:15 GMT -8
wow
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Post by Orange on Jun 1, 2022 4:23:45 GMT -8
I'm just cautious because of of-gassing. I've used once aluminum mesh for facade plaster, it's easy to shape.
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Post by Orange on May 19, 2022 4:46:20 GMT -8
looks great!
don't know how hot outer shell gets, I'd rather use metal than plastic mesh.
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Post by Orange on May 13, 2022 9:32:54 GMT -8
thanks Forsythe for the detailed response, although I cant process all that information
so to sum up:
- yes my primary concern was the air particles, I'm glad that's not an issue - I mentioned light air-concrete (ytong multipor) and perlite only as an insulation after firebrick. Yes, air-concrete will crack but air pockets remain (an insulative properties). Perlite was fine in my case. Both are just fillers and don't hold any structural load.
- I am a bit concerned about off-gassing. I didn't measure an increase in VOCs but if I smell right above my stove I can smell something unusual and can't tell if it's IFB, air-concrete, perlite, mill-scale, old cast-iron coating or something else. Any ideas?
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Post by Orange on Apr 2, 2022 5:28:04 GMT -8
great info Forsythe - so the best would be to simply avoid ceramic fibre and insulative firebrick. So that is not a good solution - I'll repaint it with fumed silica or just throw it out. (coating with aluminum powder to me sounds like a recipe for alzheimer)
And I have a question - what do you think about air-concrete (Multipor) for insulation after refractory bricks, it's cheaper and more available than calcium silicate boards that are normally used:
Or perlite:
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Post by Orange on Mar 17, 2022 8:51:10 GMT -8
you have a long riser and round pipes inside the mass - maybe the gas velocity is too big and leads to over-fueling and low efficiency (bench doesn't have time to absorb all the heat). Btw why is it called Asian core?
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Post by Orange on Feb 14, 2022 12:54:43 GMT -8
build photos are satisfying to watch
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Post by Orange on Jan 15, 2022 13:11:04 GMT -8
that thing is huge I'm curious to hear how it's going.
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Post by Orange on Jan 12, 2022 13:10:15 GMT -8
looks amazing, it would be cool if it stayed green
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Post by Orange on Jan 4, 2022 12:20:01 GMT -8
there's a lot of ceramic fibre, no concern for particles flying around?
insulation can also be done with perlite, expanded clay, air-concrete etc.
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Post by Orange on Dec 19, 2021 6:53:46 GMT -8
1. there's no flexibility and upper box shouldn't have anything in it while stove runs 2. no 3. it's possible, look up sidewinder on batchrocket.eu
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