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Nice, solid, wedging table. Got my vote...
Here are a couple of pics from a commercial model. I think what makes it safe is that the super hot exhaust air is really just a trickle (just enough to maintain negative system pressure), which immediately gets mixed and cooled with a far greater volume of room temp. air. You want as little flow as possible - just enough to prevent leaks through other cracks etc., and channel it to the vent instead of seeping into the room.
Thanks - it's not a problem unless you are putting galvanized metal inside the kiln. All kiln tables are made of galvanized metal, and the kiln base sits on the table, so if this was an issue it would happen with or without a kiln vent. Kiln bricks are good insulators, and the outside of the kiln just doesn't get hot enough to be hazardous. Commercial vents are also made on galvanized metal, btw, so again it's not a problem as long as you're not putting metal inside the kiln.
How to Make a Downdraft Kil...View Instructable »
Awesome - thank you. I'll get busy then :)
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