We recommend they use the sashes as low (or narrow) as possible and still
work. In all cases, the fumehoods should not be used with vapors being
generated when the sashes above the point were they are marked to operate at
100 fpm

We first test at full-open, if the fume hood draws at 100 fpm then that's
where we mark it.
If not, we lower it to 24 inches, then to 18 inches. If it doesn't 'pass' at
18" we put in a work order to get the hood fixed.

-Russ

Russell Vernon, Ph.D.
Laboratory / Research Safety Specialist
Environmental Health & Safety
University of California, Riverside
900 University Ave.
Riverside, CA 92521

russell.vernon**At_Symbol_Here**ucr.edu
www.ehs.ucr.edu

Direct: (909) 827-5119, on 7/17/2004 area code becomes (951)
Admin: (909) 827-5528
Fax: (909) 827-5122


-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU]On Behalf Of
Gordon Miller
Sent: Monday, May 03, 2004 1:16 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Fume Hood Sash Settings

Two dumb questions:

1.  At what height do you advise hood users to set their sashes?

2.  At what sash height do you test face velocities?

Gordon Miller
Lawrence Livermore National Laboratory
P.O. Box 808  (L-379)
Livermore, California 94550
(925) 423-8036
Fax (925) 422-5176
miller22**At_Symbol_Here**llnl.gov

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