I had to fight with my University's design team to get my cabinets vented. Their reasoning for having the standard to not be vented was that researchers were having their flammables cabinets vented without flash arrestors. So, we were able to convince them to allow mine to be vented by putting into our contract that they would be vented with flash arrestors and that they could be completely sealed off (bunged) from the ventilation system when needed (such as when the fans are being cleaned). We also got all of our under hood corrosives cabinets vented, but I did specify that the ductwork for the types be different. The architects originally had all of our cabinets vented to PVC and we had them change that. Now all of my storage cabinets, under hood and standalone, are vented so that they do not accumulate any fumes. I love it!
Also, my under hood cabinets do not vent into the hood itself (my old ones did), but into a duct that feeds into the exhaust upstream from the hood.
Best of luck,
Laboratory Manager/Adjunct Lecturer/Chem Club Co-Advisor
Department of Chemistry & Biochemistry
University of Michigan-Flint
Flint, MI 48502
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Chance, Brandon
Sent: Friday, March 03, 2017 4:48 PM
Subject: [DCHAS-L] Venting UNDER HOOD Flammable Cabinets
I am curious as to what your design standards are for new lab installs with UNDER HOOD flammable storage cabinets. Manufacturers sell vent kits for these to vent behind the baffles into the hood and, back in my researcher days, most labs I worked in had under hood cabinets ventilated. NFPA advises against venting any flammable cabinets and I am getting mixed messages from various vendors and lab design teams. ć I have read a number of other university design standards and they are also inconsistent.
What do your universities do? ć I usually recommend against venting standalone flammable storage but I am a bit torn on the under hood storage cabinets.ć
Brandon S. Chance, M.S., CCHO
Associate Director of Environmental Health and Safety
Office of Risk Management
Southern Methodist Universityć
PO Box 750231 | Dallas, TX ć 75275-0231
T) 214.768.2430 | M) 469-978-8664
"?| our job in safety is to make the task happen, SAFELY; not to interfere with the work?|' Neal Langerman
--- This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety. For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org
This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org
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