making a vent hood for small gas kiln in Equipment Use and Repair Posted August 30 · Report reply I’m not necessarily recommending this as a solution but you are asking if anyone has done this and if it worked. I made a hood system for cheep for my 16 cu’ Alpine updraft on a outside kiln setup with a metal roof and mostly metal framing. For the hood I used a galvanized metal wash tub and just your standard sheet metal single wall ducting. I lined everything with fiber and just used 4 fairly lightweight chains to suspend the assembly from my structure over the kiln. Although it could be a tiny bit bigger It’s worked perfect for the last 11 years this is not something I would consider venting inside through a structure or inside where you need to vent all the gasses. The same fiber lined pipe is on the home made down draft kiln except it’s direct connect vent pipe with no hood and both have home made sheet metal fiber lined vent caps.