[ RadSafe ] Fume Hood Face Velocity Requirement Origin

[Redmond, Randy (RXQ)]

Check "Industrial Ventilation, A Manual of Recommended Practice" by the
American Conference of Governmental Industrial Hygienist, Inc..

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf Of Falo, Gerald A Dr KADIX
Sent: Thursday, October 19, 2006 8:43 AM
To: radsafe at radlab.nl
Subject: [ RadSafe ] Fume Hood Face Velocity Requirement Origin

Good morning all,
 
I was asked to look into the recommended face velocity for fume hoods of
125 linear feet per minute (lfpm).  Specifically, I am looking for the
origin of this recommendation, if there is any regulation requiring this
face velocity, and measurement protocol/requirements.  I have Shapiro's
text (4th edition) that does cite the 125 lfpm but doesn't give the
source nor measurement protocols.  My colleagues and I assume that the
measurements should be made with the hood sash open about 30 - 40 cm,
although I've heard about measurements being made with the hood fully
open.
 
Any leads would be greatly appreciated.
 
Jerry Falo
 
 
________________________________

The statements and opinions expressed herein are my responsibility; no
one else (certainly not my employer) is responsible, but I still reserve
the right to make mistakes.
 
Don't panic! - Douglas Adams in "The Hitchhiker's Guide to the Galaxy"
 
Gerald A. Falo, Ph.D., CHP
Kadix Systems
U.S. Army Center for Health Promotion and Preventive Medicine - Health
Physics Program jerry.falo at us.army.mil
410-436-4852
DSN: 584-4852
 
 
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