From: Erik A Talley <ert2002**At_Symbol_Here**MED.CORNELL.EDU>
Subject: Re: [DCHAS-L] laminar flow hood purchase
Date: Fri, 8 Nov 2013 17:41:08 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 86580C5D0F281C41BAB4B1D77F7E7E1B4E364D5B**At_Symbol_Here**
In-Reply-To <8D0AABD9067A603-1804-21E9C**At_Symbol_Here**>

Part of the issue is the terminology being used. A lot of people use “laminar flow hood” (and other similar terms) and “biosafety cabinet” interchangeably. Both have laminar flow (describing the air flow), but one is designed to protect you and the product while the other is designed to only protect the product. The link below references a laminar flow hood that filters the air and blows it back at you. The protection is for product only (clean air always running across the product). There are lots of reasons people only need product protection. A biosafety cabinet provides a laminar flow of air but also ensures all the “exhaust air” goes through a HEPA filter before being exhausted. If you expect this is going to protect you and the product, it should be designed consistent with the National Sanitation Foundation 49 standard for biosafety cabinets. Of course, you also have to determine if the HEPA filter is going to protect you (e.g. anesthetic gas in a BSC). Here’s a case study describing an incident that isn’t all that uncommon, unfortunately:


Thanks to the Desert Research Institute for publishing lessons learned information!!!






From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Monona Rossol
Sent: Friday, November 08, 2013 12:18 PM
To: DCHAS-L Discussion List
Subject: Re: [DCHAS-L] laminar flow hood purchase


I'm confused:  On the first page of the link it says:


These vertical laminar flow Hoods are ideal for applications which are not hazardous to the operator but require a clean work area.

Monona Rossol, M.S., M.F.A., Industrial Hygienist

President:  Arts, Crafts & Theater Safety, Inc.

Safety Officer: Local USA829, IATSE

181 Thompson St., #23

New York, NY 10012     212-777-0062



-----Original Message-----
From: Mark Lee <
Sent: Thu, Nov 7, 2013 11:39 am
Subject: Re: [DCHAS-L] laminar flow hood purchase

    From what I have seen, the Laminar Flow Hoods are one of the best on the 
market.  Performing Lockout/Tagout audits, I see a lot of the bench top vertical 
models.  Here is a link for your viewing.
I hope this helps you out.
Mark C. Lee
Safety Manager Specialist
Lockout/Tagout Specialist
> On Nov 7, 2013, at 10:11 AM, "Bradley, Shelly" <Bradley**At_Symbol_Here**HENDRIX.EDU> wrote:
> One of my faculty is interested in a laminar flow hood. I know nothing about 
> What do I need to know?
> Are the self-contained ones any good?
> Which brands are best?
> Thanks for your help!!
> Shelly Bradley
> Authorized OSHA Trainer
> Instrumentation Specialist
> Laboratory Development Assistant
> Campus Chemical Compliance Director
> Department of Chemistry
> Hendrix College
> Conway, AR 72032
> Ph:    (501) 450-3812
> Fax:    (501) 450-3829
> bradley**At_Symbol_Here**

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