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Previous by Date: Subject: Re: [DCHAS-L] vertical hood dividers Date: Thursday, July 16, 2020 at 10:44:44 AM Author: Ray Cook <raycook**At_Symbol_Here**APEXHSE.COM> |
Next by Date: Subject: Re: [DCHAS-L] vertical hood dividers Date: Thu, 16 Jul 2020 15:14:51 +0000 Author: Erik B. Pietrowicz |
I agree with Richard. We did not permit these for the reasons he cites below.
All the best,
Kristi
Kristi Ohr, Ph.D. (pronouns: she/her)
Chemical Safety Services Manager
Environmental Health and Safety
UMass Amherst
40 Campus Center Way
Draper Hall
Amherst, MA 01003
Office: 413-545-5117
Cell: 413-800-4408
kohr**At_Symbol_Here**ehs.umass.edu
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Richard Palluzi
Sent: Thursday, July 16, 2020 10:19 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] vertical hood dividers
Hoods draw their supply air from the room. So installing panels like this is very likely to affect the face velocities near the edges of the hoods. The only way to really know is to install some and ask a
balancing firm to come in and test the hoods per the ASHRAE 110 face velocity protocol before and after they are installed. If you obtain your desired average face velocity in both tests you are fine. (My experience says you have, at best, a 50/50 chance.)
You could also do the ASHRAE 110 tracer gas test but that is a lot more expensive and more open to interpretation.
Richard Palluzi
PE, CSP
Pilot plant and laboratory consulting, safety, design,reviews, and training
www.linkedin.com/in/richardppalluzillc/
Richard P Palluzi LLC
72 Summit Drive
Basking Ridge, NJ 07920
rpalluzi**At_Symbol_Here**verizon.net
908-285-3782
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Rakers, Rosemary S.
Sent: Thursday, July 16, 2020 9:42 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] vertical hood dividers
Good morning all,
I have 2 4-ft hoods directly next to each other. My dean would like to get a vertical acrylic divider to put between them. He does not want to damage the hoods in any way so this divider would have to be magnetized or hang from the top
somehow. He would like proof that this does not impede the air flow in the room. Does anyone have any ideas of how to go about acquiring said proof? What companies do these type of studies? The folks who install and calibrate the hoods?
And, is anyone else using such a thing? Or are you allowing people to work next to each other (within 4 ft) for a 3-hour lab? Or eliminating every other hood?
Thanks much.
Rose
Rose Rakers, Ph.D.
Director of Chemical Laboratories and Chemical Hygiene Officer
Department of Physical Sciences/College of Science
Birck Hall, Room 118
5700 College Rd. l Lisle, IL 60532
Office: (630) 829-6571
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