[Jewelry making - Article 00438] - Re: [Orchid] Venting a torch for a classroom

[Noel Yovovich]

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>     A vacumm cannot be achieved in a room that has unlimited access to
>     new air. 

    Still not evident to me why you would want or need a vacuum. You
    take air out, it will be pulled in wherever there is an opening. As
    for directionality, if you have the exhaust placed to pull the fumes
    away from your face, that pretty much takes care of that. Air will
    move from all over the room toward the exhaust 

    Are you by chance an engineer? Give a man a hammer and everything
    looks like a nail... ;>) 

Noel
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