From: "GOODE, SCOTT" <SRGOODE**At_Symbol_Here**MAILBOX.SC.EDU>
Subject: Re: [DCHAS-L] Vented flammables cabinets
Date: Mon, 29 Jun 2015 15:24:17 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 5E76EF51D002544DAC5CFA68490FC5DA72AB670A**At_Symbol_Here**CAE145EMBP03.ds.sc.edu
In-Reply-To


Our Fire Marshall’s policy, which I think is based on fire code, is to require that the supply and exhaust ports both be equipped with a fire arrestor to prevent a fire from jumping floors.   An internet search will locate them –Grainger is one supplier. 

 

--------------------------------------------------------

Scott Goode, Professor

Department of Chemistry and Biochemistry

University of South Carolina

631 Sumter Street

Columbia SC 29208

 

Email:   Goode**At_Symbol_Here**sc.edu

Phone: 803-777-2601

Fax:       803-777-9521

 

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Kohler, Christopher E
Sent: Monday, June 29, 2015 9:50 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Vented flammables cabinets

 

Dear Listers,

 

Thanks in advance and pardon the cross-posting.

 

NFPA 30 states that IF flammable cabinets are ducted to the ventilation system that the supply be provided at the top and the exhaust be connected to the bottom. Presumably, this creates a downward directed cross draft that ensures removal of vapors with high vapor density from the bottom of the cabinet.

 

I have two questions:

 

1) if there is not a ducted supply does that supply bung stay open or closed?

 

2) if an existing cabinet is vented with the exhaust from the top should it be changed to vent from the bottom?

 

Many thanks,

 

Chris

 

Christopher E. Kohler, MS, LPG, CCHO

Laboratory Safety Manager, EHS

Laboratory Safety Instructor, ACS

Adjunct Faculty, SPEA

 

Environmental Health and Safety

1514 E Third Street

Bloomington, IN 47405

(812) 855-5454

cekohler**At_Symbol_Here**iu.edu

 

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