You definitly need to have venting. And even with a fan in the wall it only
takes out 65% of the fumes. It needs to be one that is definitly over head.
But I found that the one that pulls from under the kiln is 90-95 % effective.
The way you get it done is to say you are concerned for the kids. You
wouldn'twant to have any parents complaining, especially with kids with
breathing problems. Gail