SO I recently fabricated a green house to tie into my pole barn where my studio is at. I guess I wasnt think thinking when if came to where my kiln room was at and where the exhaust would go. The arrow points to where my kiln is inside and the exhaust comes out from that area. I have a ventilation fan there to help with any fuming. I had worried recently that maybe the fumes might pose a danger even the green house is sealed to a point. The vent windows are on the far right wall which you can see in the photo. I have been wanting to use a dark cone 6 clay that contains Maganese Dioxide and I know the fumes are toxic. I was curious about if the position green house over all could present a danger? The green house will be for a aquaponics system where there will be an open fish tank and grow beds. Like I said the greenhouse is sealed in the sense that fuming really would have to try hard to get in. Still though I question could it pose a problem especially with growing edible food.