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Post by pinhead on Dec 28, 2023 14:07:32 GMT -8
I believe this has been asked in various threads but I haven't really come across a solid answer. My family and I are in the process of moving into a new house with a full basement in which I will be building a Peterberg Batch Box (or equivalent). For the size of the house I've settled on an 8-inch system-size. The house doesn't have a chimney so I will be installing a "Class-A" double-wall insulated chimney. I'm constantly fighting the "bigger is better" urge and trying to decide between 6 or 8 inch. Here is an example of the chimney pipe I'm looking at, available in both 6 and 8 inch sizes: a.co/d/6P6tmD0The chimney will be 16 to 18 feet tall, outside the building envelope. I've read conflicting info on the web (or just as likely I'm misinterpreting what the pros are saying) about chimney sizing. From what I've read, the smaller-diameter chimney will produce "more draft" while simultaneously not being able to "draw enough" to service a larger stove. Those seem like conflicting statements - which is likely where my misinterpretation is coming to play. I've always been under the impression that a larger-diameter chimney will produce a stronger draft which is why I assume the 8-inch chimney will "future proof" the system vs a 6-inch chimney. I've run 6-inch PBB's on very short, poorly insulated, "subpar" 6-inch chimneys without any issues. I always include a bell bypass to help with cold-start. With just that experience it seems an 8-inch system feeding into a much much better 6-inch chimney will likely work but I would hate to spend the thousands of dollars on a chimney just to find out it's insufficient. Can someone set me straight on this?
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Post by pinhead on Dec 8, 2023 12:28:38 GMT -8
I posted this image way back in 2017 and it didn't gain much traction. I didn't have the time/space to build another stove to experiment on so it didn't go anywhere. It looks suspiciously similar to the DSR3. Great minds think alike, it seems. This one utilized an S-Portal to feed preheated tertiary air into the horizontal afterburner tube. I noticed that the DSR3 doesn't have any provision for tertiary air, though. I assume this has already been tried or am I incorrect?
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Post by pinhead on Nov 11, 2022 11:58:16 GMT -8
Thanks for your information. I guess thermal cycles are guilty for this. Did you try to pack the vermiculite as much as possible? No, I just poured it in. Probably should have tried to pack it a bit but at the time I thought it was going to be temporary. Until it wasn't haha.
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Post by pinhead on Nov 11, 2022 7:29:04 GMT -8
Some pictures of my vermiculite insulated tubes. I've done that before and I found that after a while the vermiculite will settle which leaves an open gap at the top. I just added more to the top after a few months but it's something to keep in mind if installing in a permanent configuration.
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Post by pinhead on Jul 21, 2022 10:06:22 GMT -8
Thread resurrection. This is THE original 5-minute riser after one year of use (I finally got around to uploading the video I took way back in 2019). youtu.be/uyKA6CR4epk
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Post by pinhead on Jul 21, 2022 9:58:39 GMT -8
I know this was ages ago. And there's probably already been better "case studies" of the longevity of the 5-minute riser. But FWIW, here's after a year (the video was taken a few years ago but I just now got around to uploading my videos to Youtube). youtu.be/uyKA6CR4epk
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Post by pinhead on Jul 14, 2020 6:23:45 GMT -8
That's how I did it, though I didn't fold the CFB back over the edges of the port. That should definitely make it more robust. Good addition!
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Post by pinhead on Oct 15, 2019 13:16:49 GMT -8
Many thanks! But now we have two!
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Post by pinhead on May 23, 2019 7:58:35 GMT -8
Has anyone out there used rock wool for a five minute riser? I can’t get ceramic fiber but found rock wool for a good price Yes, I've tried. It was a colossal failure. With good, dry wood the rockwool won't last more than a hand-full of burns.
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Post by pinhead on Mar 11, 2019 11:45:30 GMT -8
The home of my original 5-minute riser will be torn down some time this spring; the property was sold and we had to move out. Is a perfect time to get some pics of how everything is holding up. This will have been the longest-running 5-minute riser in existence so I'll be able to definitively show its longevity.
I can't say it'll be real soon so this post may be somewhat of a tease... But I'm not going to leave my BB RMH there!
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Post by pinhead on Feb 22, 2019 12:39:01 GMT -8
I used to, but it's not necessary. "Smoking" meats is a misnomer, you don't need visible smoke. Also, none of our burners is burning smoke free 100% of the time. All of us are making smoke when we load or when the fire is dying, even if it's not visible to us. Smoking meats is not about smoke, but rather maximizing cook times while controlling how much flue gas the meat is exposed to. If you have a smokey fire, you cover the meat after a short time. If you have thin blue exhaust, you don't need to manage the finish on the meat as much. The smoke ring on meat is not actually from smoke at all, and I think a lot of what we attribute to smoke in the meat is not smoke but rather other products of combustion and the way they interact with the meat. Here's some info: amazingribs.com/more-technique-and-science/more-cooking-science/mythbusting-smoke-ring-no-smoke-necessaryVery, very interesting.
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Post by pinhead on Jan 29, 2019 6:40:45 GMT -8
We musn't forget that peterberg tried using a single-vortex during testing of the original batch box and found that the double-rams' horn pattern was far superior in every aspect.
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Post by pinhead on Jan 18, 2019 9:51:52 GMT -8
My grandpa has a wood-burning central air system and it has two of those installed. Works really well to keep draft stable.
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Post by pinhead on Jan 8, 2019 6:10:15 GMT -8
Unfortunately I never got around to actually building the thing. I believe peterberg tried it when designing his DSR and from what I remember, the round tunnel didn't work up to his standards.
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Post by pinhead on Jan 8, 2019 5:42:16 GMT -8
Yes, I'm still using my original 5 Minute Riser without any issue. I lit the stove the day before yesterday from cold and it worked as well as the day I built it. The blanket is drastically out-lasting the mortar around the firebox port. My PBB is a 6-inch version using 1" of blanket inside an 8" stovepipe. I regularly burn Osage Orange splits which is the hottest burning wood I've ever encountered. Pinhead, is this still with the core made from plain red brick?! Yes. I haven't modified the stove in any way since I built it, though I need to repair the throat area, as my clay-ash-sand mix isn't holding up very well there. Matthewwalker sent me some ceramic fiber board to repair it but I misplaced the box for a long time (recently found it) so I haven't even repaired that yet.
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