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Subject: Re: Fume Hood airfoils
Date: Fri, 14 Jul 2006 17:09:40 -0400
Author: Jay Young 		Next by Date:
Subject: High school chemistry project was a blast
Date: Wed, 19 Jul 2006 15:20:41 -0400
Author: Ralph Stuart


Date: Fri, 14 Jul 2006 17:04:09 -0400
Reply-To: chemcon**At_Symbol_Here**JUNO.COM
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Jay Young <chemcon**At_Symbol_Here**JUNO.COM>
Subject: Re: Fume hood sashes
Comments: To: rstuart**At_Symbol_Here**UVM.EDU
Ralph,

Removing that air foil is a bad, unsafe idea.  The purpose of the air
foil is to enhance non-turbulent air flow into the hood.  When the air
flow into a hood is turbulent, some fraction, which could be as large as
80 or 90%, or greater, of the toxic fumes and gases that should have
exited out through the venting of the hood now, with turbulence, enter
the room where people are working and breathing the toxic contaminated
air.

Hoods from which those air foils have been removed should NEVER be used
as fume hoods until the air foils are replaced and the hood re-tested to
be sure it is in compliance with the manufacturer's and installer's
specifications.

Jay Young

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