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Post by fishalive12345 on Feb 29, 2024 4:54:39 GMT -8
Hi, as always, thanks to all who share their knowledge and experiences here. I'm building a vortex style cook stove (very very slowly). I've put in place a 6 metre,120mm stainless chimney but am thinking about building a 110mm system. The size change would take place at the two horizontal exits from the stove, under the cooktop and the exit from the mass. The first heats only the cooktop and bypasses the mass. My question is: what's the wisdom on increasing the chimney size with respect to the system? Brian
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Post by Vortex on Feb 29, 2024 5:33:35 GMT -8
Should be no problem. Is the stainless chimney insulated, straight and with a smooth surface inside?
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Post by fishalive12345 on Mar 1, 2024 2:49:45 GMT -8
Hi Trev, thanks for your answer. The 120 steel pipe goes through a stone wall at 30 degrees at head height and goes up straight on the other side of the thick stone wall. It's smooth and will be insulated by pouring loose vermiculte between the tube and the old 20x20 concrete block chimney. The old chimney probably has an asbestos lining at least inside the wall. The vermiculite insulation will go down as far as the point where the pipe goes into the wall.
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Post by fishalive12345 on Mar 1, 2024 2:56:40 GMT -8
The stove I'm building is closely based on Trev's vortex stove. I have another question about how to organise the smoke path through the fire brick mass but I need to make a sketch to illustrate the problem. Should I post it this thread?
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Post by Vortex on Mar 1, 2024 5:21:57 GMT -8
Chimney sounds all OK. If you put a cowl on the top of the chimney make sure the exit is at least twice the CSA of the pipe. You can post your question and sketch here or in the Vortex stove thread, up to you.
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Post by fishalive12345 on Mar 1, 2024 22:43:04 GMT -8
Ok. Thanks. Will post in the Vortex thread when I've got the sketch.
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