Thanks for that--I guess I'll have to press for more details. I started a small bakery a few years ago, but we used a regular old gas deck oven. This wood-fired stuff is all new to me--it's hard to know what you don't know...you know? :-P
When I spoke to the building inspector on the phone, he said that technically a building permit wouldn't be required (I imagine since, as you mentioned, there's nothing in the IBC that applies), but I should talk to Mechanical. Mechanical gave me a rough estimate for permits/licensing fees, but didn't explain what permits and licenses that would entail. They just suggested that I would need very detailed plans for the review process.
What confuses me is that there are brick oven bakeries with custom-built ovens all over the U.S.--clearly there is some way to get them approved, but nobody seems to know how. Here in town, wood-fired baking seems to just be catching on. There are a handful of ovens around, but they all seem to be pre-cast UL-certified pizza affairs. No bakeries to be found.
If there is some pushback, do you have any idea if a UL field inspection would do the trick? I'm not thrilled about the extra expense, but I'll do it to have the oven of my dreams.