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Post by BenAlexanderT on Nov 26, 2020 2:28:50 GMT -8
Hello there again. I'm building a new stove with a barrel and bench. The whole built has an ISA (rounded up) of 5 sq meters/53.8 sq feet. The concern I'm having is the exhaust pipe length. It goes 2.1 meters up then there is a 90 degree bent and goes 4.8 meters straight. That's inside the house. Afterwards there's 90 degree that goes 2 meters up. The total pipe ISA is 4.24 sq meters/45.6 sq feet. All the pipe will be insulated with 25 mm/1 inch rockwool blanket, except the part that goes through the 30cm wall. Will this cause me any problems? Below there are 2 pictures that might help understanding. Thanks in advance photos.app.goo.gl/fKPAp8vu8oPpg6sw7photos.app.goo.gl/3LoziWaeyTcxgVK69
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Post by josephcrawley on Nov 26, 2020 5:07:50 GMT -8
With that long horizontal run of pipe you are going to have problems. I would advise rethinking your pipe. Either move the stove or figure out how to go straight up.
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Post by pianomark on Nov 26, 2020 5:41:20 GMT -8
Yes, I agree. Even if you are able to overcome startup and draw issues (doubtful), I think you will still have a problem with condensation.
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Post by BenAlexanderT on Nov 26, 2020 11:13:45 GMT -8
Ok, There is another option, to move the exhaust at the end of the bench, so the horizontal pipe will have no more that 2m length. So 2 meters up then 2 meter horizontal and again 2 meters up. All of them insulated with 25mm/1 inch rockwool blanket. Will it still be a problem ? :/
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Post by pianomark on Nov 26, 2020 15:16:50 GMT -8
Can you run a 45 degree angle instead of up and over? Then the condensation will run back into the bench, or to a drain at the low point. Also that eliminates one elbow and decreases overall length, which will help the draft.
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Post by BenAlexanderT on Nov 26, 2020 23:50:18 GMT -8
Unfortunately that's not possible. I might have to change my plans and do something else. But, in that case I will still have 1 meter max horizontal flue pipe.
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Post by peterberg on Nov 27, 2020 0:48:06 GMT -8
My opinion: avoid horizontal flue pipe at all cost. It's a pain to sweep if at all possible, it will accumulate dust and even if insulated it will slowly grow a layer of soot. Forty-five degrees is second rate but doable.
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Post by BenAlexanderT on Nov 27, 2020 2:34:46 GMT -8
Unfortunately the house has all the flue exits at the sides. I will see if I can open a cheap exit at the top.
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Post by BenAlexanderT on Dec 25, 2020 9:57:58 GMT -8
Hello and Merry Christmas everybody since we cant do anything in greece due to the very strict quarantine rules, i decided to start the heater without the bench though. Day 1 photos link: photos.app.goo.gl/D3ePve437HWwGq2FAmore photos will come soon. Cheers
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Post by belgiangulch on Dec 25, 2020 11:06:48 GMT -8
Looking Good Ben! I don't blame you a bit for getting started. I could never wait beyond acquiring the first material! Keep updates and photo's coming!
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Post by BenAlexanderT on Dec 26, 2020 9:18:06 GMT -8
Hi again with heater update. Today I cleaned, cutted and welded the steel for the core base, i cutted the firebricks and i did some dry stucking. Updated album: photos.app.goo.gl/D3ePve437HWwGq2FA
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Post by BenAlexanderT on Dec 28, 2020 10:18:39 GMT -8
Yesterday and today I was building the core. I am almost done. I also removed the rust from the barrel. Tomorrow I will start the welding of the barrel with some sheets of metal and I will finish the core Album updated: photos.app.goo.gl/D3ePve437HWwGq2FACan refractory paint withstand the stress of the DSR2? The paint I could find is for a max of 800 degrees.
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