From:
Jessica Martin <jmartin54321**At_Symbol_Here**GMAIL.COM>
Subject:
Re: [DCHAS-L] Horizontal vs. vertical sashes
Date:
Apr 3, 2026 21:12 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID:
<66DF2B0A-0A0F-4CEC-8ABA-51CFCC6DEE63**At_Symbol_Here**gmail.com>
In-Reply-To:
<BYAPR02MB56867E5078CF184EE002E7498C51A**At_Symbol_Here**BYAPR02MB5686.namprd02.prod.outlook.com>
Hi Jack,
I am not aware of any studies - and would be interested if anyone does one!
As someone experienced with organic and polymer synthesis, I do prefer using the side-to-side sashes for the following reasons: (i) I can close the sash openings to smaller dimensions, (ii) I can reach things and manipulate items more easily through the vertical sash openings than I can through the horizontal sash openings, and (iii) I can more readily have a pane of glass between me and the experiment by placing that in front of me and reaching in around the sides.
We do measure face velocities for both horizontal and vertical where I work and the numbers come in reasonably close to one another.
Hope this helps!
Jessica A. Martin, Ph.D.
323-327-3974
jmartin54321**At_Symbol_Here**gmail.com
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On Apr 2, 2026, at 5:22 PM, Jack Reidy <0000233ca1fd2102-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> wrote:
Hi all,
A new PI joining our Chemistry Department is sharing a very strong preference for vertically-split fume hood sashes (i.e., ones that open side to side), saying that they’re safer. Is anyone aware of any studies on this, or have any other insights? Thanks!
Sincerely,
Jack Reidy (he/him)
Research Safety Specialist & Chemical Hygiene Officer
Environmental Health & Safety
Stanford University
484 Oak Road, Stanford, CA, 94305
Tel: (650) 497-7614
I acknowledge that the land on which I live and work is the ancestral and unceded land of the Muwekma Ohlone Tribe. As an uninvited guest on these lands, I am a beneficiary of the ongoing displacement of the Ohlone people. I pay my respects to the Native peoples, past and present.
