[Jewelry making - Article 00276] - Re: [Orchid] Venting a torch for a classroom

[Kennon Young]

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    A vent will do little to nothing unless your classroom can create a
    vaccumm. You will want to seal off all of the holes in the walls
    (welcome to my life!), the doors, and the air condidtioning/heating
    ducts (these you will want to have a toggle on-off). Once your room 
is
    sealed, you want an intake and an exhaust. The amount of cubic air in
    the room will determine the needed pull of exhaust. OSHA regulations
    require air exchange every 10 minutes- it is quite easy to exceed
    this number once you have a sealed room. Keep in mind, the ducts
    themselves have eletrostatic pull and will lessen the strength of
    your exhaust fan. 

    If you live in cold areas, you MAY want to put in heating coils-
    this would only be neccessary if your customers will be around. I
    personally dont have one and Ive used my 5 min. air exchange in -25*F
    weather with no problem. Supposedly, there can be some sort of
    combustion problem with hot/cold areas in buildings. ASK AN EXPERT! 

    So, your problems are: 

    -Sealing your room (ridgid foam and expanding foam are like a
    godsent for this-also very cheap) 

    -finding the cubic area of your room and finding a fan that can pull
    this within 10 minutes 

    -Installation 

    All of this may seem excessive. Futhermore, I dont know a single
    jeweler within 100miles who has or cares about a studio that is
    health concious/OSHA compliant. If it werent for a clean set of
    lungs, Id be a whole lot more upset at this lack of diligence.
    Furthermore, if I ever drop (godforbid) my liver of sulfur into my
    rhodium plating solution, I can quick hit my exhaust fan button,
    flee the room and in 6.40 minutes, I can safely go back to work. 

Good Luck,
Kennon
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