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Subject:
Re: Fume Hoods
Date:
Sep 22, 2011 00:08 UTC
Author:
Beltis.K**At_Symbol_Here**TIAXLLC.COM
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Subject:
Re: Fume Hoods
Date:
Sep 22, 2011 01:42 UTC
Author:
Rob Toreki <info**At_Symbol_Here**ILPI.COM>
From:
Peter Zavon <pzavon**At_Symbol_Here**ROCHESTER.RR.COM>
Subject:
Re: Fume Hoods
Date:
Sep 22, 2011 01:42 UTC
Reply-To:
DCHAS-L Discussion List
In-Reply-To:
<B06FE04AACB936438D57258499897CD91630D6DA6F**At_Symbol_Here**phxe2k7.tusa.tkinet.com>
Date: Wed, 21 Sep 2011 21:42:27 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Peter Zavon <pzavon**At_Symbol_Here**ROCHESTER.RR.COM>
Subject: Re: Fume Hoods
In-Reply-To: <B06FE04AACB936438D57258499897CD91630D6DA6F**At_Symbol_Here**phxe2k7.tusa.tkinet.com>
With the materials you list as intended for current use, I
would
never accept a recirculating hood.
However, there is one other issue to consider in
addition to
all the points already mentioned on this topic. Even if you
have
ductless hoods for low hazard uses, which would be the only really
acceptable
application in my opinion, how confident can you be that a change next
month,
next year, or in five years will not result in the use of other
materials, not
really suitable for use in a recirculating hood? It is hard enough in
industrial
labs to ensure that a hood in not improperly applied that way. In my
opinion, in
academia it is virtually impossible.
I don't believe that lab buildings should be
designed so
narrowly that only a limited number of very specific items are suitable
for use
in the lab without major renovation. Plan for the unknown future,
or at
least to permit its arrival, without the need to completely rework your
physical
plant.
Peter Zavon,
CIH
Penfield,
NY
PZAVON**At_Symbol_Here**Rochester.rr.com
Dear
colleagues:
We
are in the process of building a new Laboratory and contemplating
between
using Dustless Fume Hoods vs. Ducted Exhaust Hoods. We will be using a
variety
of hazardous chemicals including carbon disulfide, acetonitrile,
toluene,
benzene, some carcinogenic suspect chemicals, hydrogen sulfide and
sulfur
dioxide gases.
I
appreciate sharing your experiences with ductless fume hoods and
whether you
recommend these type of hoods for hazardous chemical work using the
aforementioned chemical examples as well as advantages and
disadvantages of
these hoods vs. the ducted exhaust hoods (safety concerns, costs,
maintenance,
etc.)
Thanks,
Michael
Hojjatie, Ph.D.
R&D
director, TKI
