Date: Fri, 20 Mar 2009 14:52:45 -0700
Reply-To: Russell Vernon <russell.vernon**At_Symbol_Here**UCR.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Russell Vernon <russell.vernon**At_Symbol_Here**UCR.EDU>
Subject: Re: Installation of Fire Sprinkler in Fume hood?
In-Reply-To: A

This requirement is in the International Building Code, parts of which California adopted. I would argue back that the fume hood duct is not a ‘product conveyance’ and the vapors will not exceed 20 % of the LEL (you may have to do an experiment to prove this to your local “Authority Having Jurisdiction”

Years ago John Palmer at UCSD spilled a liter of ether in the hood all at once and measured something less that 10% of the LEL – but you may want to talk with him about how he did that…


Russell Vernon, Ph.D. 
(951) 827-5119

From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of MICHELLE STEWART
Sent: Friday, March 20, 2009 12:08 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Installation of Fire Sprinkler in Fume hood?

We are being told that our new fume hood requires a sprinkler inside the hood in case of a fire. I'm thinking this isn't so hot especially when a water reactive chemical is in the hood! I'm also thinking this will compromise the structure of the hood. Has anyone had this come up or know reasons why this is required and IF its required?


Michelle Stewart

Coordinator, Science Labs
Santa Rosa Junior College
Petaluma Campus
680 Sonoma Mountain Parkway
Petaluma, Ca 94954

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