From: Kristi Ohr <kohr**At_Symbol_Here**UMASS.EDU>
Subject: Re: [DCHAS-L] vertical hood dividers
Date: Thu, 16 Jul 2020 14:50:44 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: BL0PR14MB3795AEA06886199E6C78113EC77F0**At_Symbol_Here**BL0PR14MB3795.namprd14.prod.outlook.com
In-Reply-To <004b01d65b7c$18cc41c0$4a64c540$**At_Symbol_Here**verizon.net>


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

www.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

ben.edu

Follow us: facebook.com/benedictineuniversity

 

 

 

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