[Jewelry making - Article 00498] - Re: [Orchid] I Attemped to build a ventlation system But...

[Dan Wellman]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

    An excellent post from Charles Lewton-Brain! The only thing I
    can add is that straight pipe with the least amount of elbows is
    the least restrictive and therefore the best in ducting.  Avoid
    corrugated, or plastic spiraled ducting if at all possible,  and
    be aware that bends add a great deal of equivalent length when
    compared to straight pipe. 

    Options to be considered for "makeup air" (to replace the
    exhausted air) aRe: 1 Run an intake from outside (away from
    outside fume sources, e.g. exhaust vents, loading docks,  etc.)
    to the return on your forced air furnace or adjacent to your work
    area.  This could be equipped with a manual butterfly balancing
    damper etc. 2 Use a Heat Recovery Ventilator to do your
    exhausting.  These are designed to ventilate the newer "tight"
    houses which have problems with the indoor pollution being much
    worse than the outdoor  air pollution.  (A HRV recovers some of
    the heating or cooling from the exhaust air). 3 Manually crack
    open a window when exhausting. IMHO the least desirable because
    it is the most subject to human failure. 

    Lastly test your ventilation under the most severe condition,
    running all exhaust fans (bathroom, kitchen, etc) clothes dryers,
    furnace etc. etc. Remember that anything burning uses oxygen and
    draws a vacuum into the space.  A lite match can be used to check
    for spillage at the draft diverter inside your gas furnace.  It
    is normal for there to be a slight downdraft on some units for a
    couple of minutes when the furnace first starts but this should
    clear and reverse within a couple of minutes as the furnace and
    chimney heat up. 

    Anyone with specific questions can E-mail me privately and I
    will try to help. 

DanWellman AT worldnet.att.net
HeatingVentilationAirCondtioning serviceman 

____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________