Hi Jack,
I haven’t come across any hard facts about which direction is safer in an absolute sense, just anecdotal assertions. I suspect in a practical sense, this is really more of a personal preference question.
Regards,
Andrew
Andrew H. Chung, M.S., CCHO
Chemical Hygiene Officer
Environment, Health, and Safety
University of California, San Francisco
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
On Behalf Of Jack Reidy
Sent: Thursday, April 2, 2026 2:23 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Horizontal vs. vertical sashes
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
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.
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