adiel
Junior Member
Posts: 119
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Post by adiel on Mar 21, 2014 12:25:36 GMT -8
dear all for more then a year we are building rmhs here in israel. at first the ianto's j system and in the last 6 months we are doing the peter berg's batch box. the j system was ok but 1 we couldn't get it to be totally smoke backs free 2 the feed tube is small and needs to be loaded often (every 45 minutes) 3 cold starts the 2nd thing is the most problematic for people to accept. the batch box is amazing (many thanks peter). we are building a 17 cm diameter riser and 18 cm flue. we are making a by-pass at the beginning of the flue and it solves the cold start problem. 1 we get 550 - 600 c at the top of the barrel 2 it holds a big log of pine wood for 3 h with good heat. 3 it is relatively clean here it is - (any comment?) www.youtube.com/watch?v=L9idkPNaTvYwww64.zippyshare.com/v/44005266/file.htmlwww64.zippyshare.com/v/34242198/file.html the problem we are facing again and again is a design issue - because the heat riser is high and at the end of the box it is too big and not looking good enough. we thought about making a bell from fire bricks like we see here in the forum but we afraid we want get very much needed radiation because people here don't light every day. (is this true?) so i thought about putting the heat riser inside the box like in the pictures www64.zippyshare.com/v/58231299/file.htmlwww64.zippyshare.com/v/90641579/file.htmlwww64.zippyshare.com/v/72205417/file.htmlany comment will be much appreciated thanks again for this inspiring forum and knowledge adiel
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Post by mintcake on Mar 21, 2014 21:53:30 GMT -8
I am struggling to understand your pictures & idea. Are you thinking of lifting the heat-riser and putting it on top of the firebox instead of behind? So it will be taller, but front to back distance will be less?
Or are you thinking of having the bottom of your heat-riser inside the firebox and so stealing space from your fuel?
As for the bell... That will take some time to heat up so you will not get lots of instant heat like with the barrel.
You could keep the same core and heat-riser, but have a brick bell above the batch box and hide the barrel behind bricks so that it cannot be seen. (with air holes around the bottom, so that room air can reach the outside of the barrel.).
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adiel
Junior Member
Posts: 119
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Post by adiel on Mar 22, 2014 2:08:48 GMT -8
thanks mintcake. i thought about putting the heat riser inside the box and placing the port at the back side of the riser. with the current design i'm getting to 85 cm from the wall at least and 65 cm wide. 130 cm tall. with this heat riser inside the box idea i might make it to 65 / 65 / 130 cm.
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Post by matthewwalker on Mar 22, 2014 7:51:54 GMT -8
Adiel, I too don't quite understand your drawings or question. Have you seen my Walker Stove? Not sure if that's what you are describing, but the whole thing is in a box and with appropriate construction could be fit fairly close to a wall and designed so the metal radiant portion of the heater mainly focused forward into the living space.
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adiel
Junior Member
Posts: 119
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Post by adiel on Mar 22, 2014 23:33:59 GMT -8
hi matthew about my idea - the drawings are of the core only without the radiator. i want to insert the riser into the box and so making a biger fire chamber but with about the same volume. and in the dimetions aspect to make it a tall squer insted of a tall rectangle. i've seen your idea and thougt about it with flue comming out from the top and starting inside the metal box a few inches above the roof of the fire chamber. sorry for my english. hope i'm understood.
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Post by peterberg on Mar 23, 2014 0:53:57 GMT -8
Adiel,
I'm inclined to think your idea could work. Provided you make the firebox wider in order to be able to load enough fuel. There's one snag though, you will not be able to see the port because it's behind the riser which does reach to the very bottom of the firebox. So you don't know whether there is ash deposit inside. Oh, the back of the firebox will get awfully hot as well.
Maybe it's worth to contemplate this idea: placing the riser not behind the firebox but at the side instead. The port would be situated left or right close to the back of the firebox in this case. This one isn't tried or mentioned before as far as I know, so here's your chance to develop a completely new concept!
Another topic, I've watched some of your videos. A tip: when the firebox is hot, load the fuel lengthwise only. That will avoid the flames spitting out the air inlet. As a whole, when starting cold make a small kindling fire right in front of the port. As soon that's catching on add some more pieces, only lengthwise, not criss cross. The air which is able to pass between the pieces is sufficient. Even when loaded full there's no need for a campfire style.
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radek
Junior Member
Posts: 94
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Post by radek on Mar 23, 2014 2:41:47 GMT -8
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Post by amitos on Mar 23, 2014 9:15:39 GMT -8
Thanks everybody for your enlightening comments. I'm Amit, Adiel's partner to the RMH business. Peter, we love the side-heatriser idea, it actually came to my mind a few days ago and somehow didn't took it too seriously... We intend to make a first attempt, perhaps even this week (we'll update as soon as we have some results). We are also wondering about the possibility of making a side-door that will enable us to situate the core parallel to the wall (keeping the primary air inlet at the same place as your original design). Did you ever try anything like this? can you give us any advice or thoughts you have about this direction.
Thanks all and regards
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Post by peterberg on Mar 23, 2014 13:45:52 GMT -8
Yes, the standard core can be done with a side-loading door instead of a door opposite of the riser. Joris Pouls from Belgium does build a number of his stoves like this. I know that he managed to have the main air inlet at the original place, but how exactly that is done I'm unable to tell. He's using a p-channel still, albeit of a slightly different construction and some air through the door to keep the glass clean.
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Post by Robert on Mar 24, 2014 5:07:35 GMT -8
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Post by independentenergy on Mar 24, 2014 8:11:25 GMT -8
You can get pictures without going through Facebook ? thanks
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Post by Vince Runza on Mar 24, 2014 10:50:08 GMT -8
Yeah, Facebook has a permalink for albums and individual pictures. Can be hard to find, but it's there...
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Post by Robert on Mar 24, 2014 10:50:58 GMT -8
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Post by independentenergy on Mar 24, 2014 22:56:48 GMT -8
Thanks Robert
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Post by independentenergy on Mar 24, 2014 23:18:34 GMT -8
Adiel sorry, I have not yet figured out what you want to do .. but it seems interesting :-)
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