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At a minimum, I would follow the minimum clearance required by whatever fire code applies to your state and that room for egress for the occupancy level that room is rated to handle. Then take a look at ADA to make sure you meet that as well; if there are turns/angles to negotiate, for example, you may need more space for a wheelchair to navigate.
-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of DCHAS-L automatic digest system
Sent: Wednesday, December 12, 2012 12:01 AM
To: DCHAS-L**At_Symbol_Here**listserv.med.cornell.edu
Subject: DCHAS-L Digest - 10 Dec 2012 to 11 Dec 2012 (#2012-281)
There are 3 messages totaling 680 lines in this issue.
Topics of the day:
1. fume hood clearance (3)
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Date: Tue, 11 Dec 2012 15:21:04 +0000
Hi everyone:
One of the labs here is requesting the installation of a new piece of equipment. To do this, the bench top needs to be extended slightly to support the footprint of the instrument. However, the lab itself is somewhat narrow and the placement of this instrument is directly across from a chemical fume hood.
Now my question, what is the minimum aisle space needed in front of a fume hood? Everything I come across states "Éensure that there is sufficient aisle space in front of the fume hood." But what is "sufficient" (how many feet, inches, etc)? If anyone can shed some light on this or provide an actual guideline or regulation, I would greatly appreciate it. I don't want the facilities group to go through this installation and then find out we are in violation of something.
Thanks in advance!
Kathryn M. Stolz | ????? ?????
Date: Tue, 11 Dec 2012 11:11:41 -0500
Hello Kate,
For a definitive answer, you may need to check fire and local codes, as you will be required to have ample ingress/egress for emergencies ( I believe typically this is 36" to 42"clearance in the aisle). A fume hood is a place for a potential fire or explosion so you do not want to limit the ability to clear people from a room in the event of a volatile reaction in a hood.
I can tell you that fume hood manufacturers are concerned for crosscurrents. If the hood is positioned in a tight space, people walking past the hood may create crosscurrents which could disrupt airflow and result in loss of containment. Most modern hoods are equipped with airfoils and baffle systems which reduce the risk of containment loss from crosscurrents such as this.
Also, there is no simple answer to this question because there are many variables. The fume hood is part of the entire building ventilation system so room air turbulence from room ventilation systems factor in as much as the hood exhaust, hood design, and usage factors (such as apparatus, heat being generated, and activity in the hood) play into containment considerations.
Kurt
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Stolz, Kathryn
Hi everyone:
One of the labs here is requesting the installation of a new piece of equipment. To do this, the bench top needs to be extended slightly to support the footprint of the instrument. However, the lab itself is somewhat narrow and the placement of this instrument is directly across from a chemical fume hood.
Now my question, what is the minimum aisle space needed in front of a fume hood? Everything I come across states "Éensure that there is sufficient aisle space in front of the fume hood." But what is "sufficient" (how many feet, inches, etc)? If anyone can shed some light on this or provide an actual guideline or regulation, I would greatly appreciate it. I don't want the facilities group to go through this installation and then find out we are in violation of something.
Thanks in advance!
Kathryn M. Stolz | ????? ?????
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Date: Tue, 11 Dec 2012 14:52:57 -0600
Dear Kathryn, The NIH published a comprehensive guide "Laboratory Fume Hood Specifications and Performance Testing Requirements" (NIH, 2010)on the use and installation of chemical fume hoods. I don't have the url handy, but it is all online. Briefly, the space in front of a fume hood and beside a fume hood are very critical to the safe performance of the hood. Look up the NIH FH Methodology reference as well on line to see the CFD studies that demonstrate the importance of clearances and position of the FH within laboratories.
Janet Baum, AIA
On Tue, Dec 11, 2012 at 9:21 AM, Stolz, Kathryn
Hi everyone:****
** **
One of the labs here is requesting the installation of a new piece of
** **
Now my question, what is the minimum aisle space needed in front of a
** **
Thanks in advance!****
~Kate****
** **
** **
****
*(OSI)TM** **pharmaceuticals LLC*****
*A Wholly-Owned Subsidiary of Astellas US LLC*****
*Kathryn M. Stolz | *????? ?????****
*Environmental Health & Safety, Manager** *One Bioscience Park Drive
(P) 631-962-0706 *| *(F) 631-845-5353 | (M) 631-339-3404 *|
** **
** **
End of DCHAS-L Digest - 10 Dec 2012 to 11 Dec 2012 (#2012-281)
Previous post | Top of Page | Next post
From: "Stolz, Kathryn"
Subject: fume hood clearance
~Kate
(OSI)TM pharmaceuticals LLC
A Wholly-Owned Subsidiary of Astellas US LLC
Environmental Health & Safety, Manager
One Bioscience Park Drive | Farmingdale, NY 11735
(P) 631-962-0706 | (F) 631-845-5353 | (M) 631-339-3404 | kathryn.stolz**At_Symbol_Here**astellas.com
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From: "Rindoks, Kurt"
Subject: Re: fume hood clearance
Sent: Tuesday, December 11, 2012 10:21 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] fume hood clearance
~Kate
(OSI)TM pharmaceuticals LLC
A Wholly-Owned Subsidiary of Astellas US LLC
Environmental Health & Safety, Manager
One Bioscience Park Drive | Farmingdale, NY 11735
(P) 631-962-0706 | (F) 631-845-5353 | (M) 631-339-3404 | kathryn.stolz**At_Symbol_Here**astellas.com
From: Janet Baum
Subject: Re: fume hood clearance
Washington University in St. Louis
equipment. To do this, the bench top needs to be extended slightly to
support the footprint of the instrument. However, the lab itself is
somewhat narrow and the placement of this instrument is directly
across from a chemical fume hood.****
fume hood? Everything I come across states "Éensure that there is
sufficient aisle space in front of the fume hood." But what is
"sufficient" (how many feet, inches, etc)? If anyone can shed some
light on this or provide an actual guideline or regulation, I would
greatly appreciate it. I don't want the facilities group to go through
this installation and then find out we are in violation of
something.****
*| *Farmingdale, NY 11735 ****
kathryn.stolz**At_Symbol_Here**astellas.com*****
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