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Bill Kielb

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  • Location
     United States - Illinois
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    All forms of constructionist pottery, education, analysis, design and repair as it pertains the ceramic arts community.

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  1. Hi Bill, I'm new to the forum so am not sure I'm using everything correctly - like this message. I saw a post you participated in dated around 2019. It was about venting a gas kiln around 280,000 BTUs, the size b vent required, length of pipe, etc. The post mentioned that there were links at the bottom to some of the technical data. Those links don't seem to work for me, and I'm wondering if you could re post them?

    I'm panning to install a propane kiln, about 240,000 BTUs (similar to an Olympic 2327 style kiln.) I'm in Rochester, NY so I'm planning to build a shed around the kiln to protect it from rain and snow, about 5'X5' on a cement pad. The shed will enclose the kiln and have a large door on one side (about 3'X6') for ventilation. The roof will be metal with a simple angle (not an inverted "Vee" style). The kiln will be a top loader with a vent hood high enough above the kiln so I can open the top and not bump my head every time.

    Are there any other posts on the site about planning this type of installation? The original post I saw is below. Thanks in advance.

    1. Bill Kielb

      Bill Kielb

      Hi John, just have not had a chance to get to this. Outdoor installation in a shed I would add a simple natural ventilation hood. Ideally the hood should be a bit larger than the kiln and mounted above it a sufficient height so if you do reduction flames will not impinge on the hood Usually 18” - 20” centered on the flame. You can Google Bvent design and pick Hart & Cooley Orr metal fab or Selkirk or your local Bvent material supplier.

      Enter the table and search the “Nat” column it’s a shed so I would try and limit to 6–8 feet. Pick a height and find a diameter that covers your load. So 6” @ 6’ 205000 btuh. 7” @ 6’ 285000 btuh. Be as accurate as practical with your size as too big is not better. Also keep in mind you likely will not operate the kiln at absolute maximum pressure to fire. So size to max, much more has more downside than upside. I would suggest terminate with a manufactured rain cap - just buy one that fits the duct

      Waterproofing is generally a tall cone solution  or in that post there were some silicone flashings for stepped roof profiles. If you hang it by chains, you will probably need a decent interior lateral support …….. or roof guys if you don’t mind the aesthetics.

      For a slanted roof if metal I might be inclined to go with the silicone flashing and turn it point up so no water dam behind it.

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