[Jewelry making - Article 00234] - Re: [Orchid] Single ventilation system

[Karen Goeller]

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    One more point for those of you using flexible duct as part of your
    ventilation system.  DON'T USE PLASTIC DRYER DUCT!!!  It is
    extremely flammable (you really shouldn't even be using it for your
    dryer, truth be told -- there is a move afoot in the U.S. to educate
    consumers about the fire hazards associated with it).  The metal
    flexible duct is a much better choice, and won't whoosh up in flames
    if your torch accidentally gets too close to it. 

    My husband (an HVAC guy), rigged me up a wonderful little
    ventilation system for my soldering table at home.  It consists of a
    high-CFM (high rate of air exchange, measured in Cubic Feet per
    Minute) fan, mounted in the window, attached to an 8-foot length of
    the metal flexible duct.  At the business end of the duct is a
    roughly  "scoop"-shaped catcher (crafted from aluminum flashing) that
    I can position right by what I'm working on .  Usually, I have it
    positioned just in back of the piece to draw any fumes away from my
    face.  It's also large enough that I can have the longer part of the
    scoop hang over the top of the piece I'm working on, for added
    efficiency, if I wish.  The whole thing is light enough to be held by
    one of my extra third-hands if I need it in a weird position for a
    job. 

    It works really well for my fabrication and soldering needs.  One
    measure I have of that is a very sensitive smoke detector on the
    ceiling about 3 feet from the soldering table.  If I light my torch
    and forget to turn on my ventilator, it takes about 2 seconds for the
    smoke alarm to go off.  If I have the ventilator on, I can solder
    happily all day with no alarm. 

Hope this helps!
Karen Goeller
kgoeller AT nolimitations.com


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