Date: Wed, 21 Sep 2011 20:09:47 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Beltis.K**At_Symbol_Here**TIAXLLC.COM
Subject: Re: Fume Hoods
In-Reply-To: <E3FF42E2803F1D4B8B2EBEF1AD8AD031431D5CC5**At_Symbol_Here**ex149013.bemisco.net>


A major consideration should be disposal costs of the spent filters and 
the effect it might have on your state or federal hazardous waste 
generator status.

-Kevin

************************************************************
Kevin J. Beltis
Director of Health, Safety and Environment
 TIAX LLC

Office: 781.879.1222
FAX: 781.879.1202
Mobile: 508.934.9382
Address:
35 Hartwell Avenue
Lexington, MA 02421-3102

TIAX, "Powered by Innovation"
************************************************************

TIAX LLC is a privately held company at the intersection of business and 
technology. Formerly Arthur D. Little's Technology and Innovation 
business, TIAX builds on its rich heritage, creating business 
opportunities and growth through the power of science, technology, and 
innovation.


"Clark, Richard C"  
Sent by: DCHAS-L Discussion List 
09/21/2011 01:07 PM
Please respond to
DCHAS-L Discussion List 

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Re: [DCHAS-L] Fume Hoods




Michael:
 
A concern that your lab designers will be bringing to the table is how the 
ducted hoods will upset the HVAC.  Certainly, planning HVAC for ductless 
hoods is much simpler (and cheaper).  However, the reasons given by others 
about the inadequacies of ductless hoods can't be minimized. 
 
The building airflow must not only accommodate the draw of the ducted 
hoods, but it also must compensate for the outside temperature (your 
climate).  I highly recommend a remote source of make-up air rather than a 
hood that supplies its own make-up air from outside.  The inline heaters 
are never good enough to compensate for truly cold temperatures and 
incoming hot air will be most uncomfortable as well as ruining any 
temperature-controlled processes in the hoods.  Finally, the makeup air 
design should also compensate for door openings and closings.  Opening and 
closing a door shouldn't disrupt the hood face velocity.  Be alert to 
these issues and make sure they are part of the design; local HVAC 
engineers rarely design laboratories and they will sweep these issues 
under the carpet.
 
Richard Clark 
Sr. Research Chemist 
Bemis Innovation Center 
Neenah, WI 54956 
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On Behalf Of 
Michael Hojjatie
Sent: Wednesday, September 21, 2011 10:08 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Fume Hoods

Dear colleagues:
 
 
We are in the process of building a new Laboratory and contemplating 
between using Dustless Fume Hoods vs. Ducted Exhaust Hoods. We will be 
using a variety of hazardous chemicals including carbon disulfide, 
acetonitrile, toluene, benzene, some carcinogenic suspect chemicals, 
hydrogen sulfide and sulfur dioxide gases.
 
I appreciate sharing your experiences with ductless fume hoods and whether 
you recommend these type of hoods for hazardous chemical work using the 
aforementioned chemical examples as well as advantages and disadvantages 
of these hoods vs. the ducted exhaust hoods (safety concerns, costs, 
maintenance, etc.) 
 
 
Thanks,
 
 
Michael Hojjatie, Ph.D.
R&D director, TKI
 

This email and any attachments may contain confidential and/or proprietary 
information. If you are not the intended recipient, you are not authorized 
to read, copy or use the contents of the email or any attachment. If you 
have received this email in error, please let us know by reply and then 
delete it from your system.

A major consideration should be disposal costs of the spent filters and the effect it might have on your state or federal hazardous waste generator status.

-Kevin

************************************************************
Kevin J. Beltis
Director of Health, Safety and Environment
TIAX LLC

Office: 781.879.1222
FAX: 781.879.1202
Mobile: 508.934.9382
Address:
35 Hartwell Avenue
Lexington, MA 02421-3102

TIAX, "Powered by Innovation"
************************************************************

TIAX LLC is a privately held company at the intersection of business and technology. Formerly Arthur D. Little's Technology and Innovation business, TIAX builds on its rich heritage, creating business opportunities and growth through the power of science, technology, and innovation.


"Clark, Richard C" <rcclark**At_Symbol_Here**BEMIS.COM>
Sent by: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**list.uvm.edu>

09/21/2011 01:07 PM
Please respond to
DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**list.uvm.edu>

To
DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
cc
Subject
Re: [DCHAS-L] Fume Hoods



Michael:
 
A concern that your lab designers will be bringing to the table is how the ducted hoods will upset the HVAC.  Certainly, planning HVAC for ductless hoods is much simpler (and cheaper).  However, the reasons given by others about the inadequacies of ductless hoods can't be minimized.  
 
The building airflow must not only accommodate the draw of the ducted hoods, but it also must compensate for the outside temperature (your climate).  I highly recommend a remote source of make-up air rather than a hood that supplies its own make-up air from outside.  The inline heaters are never good enough to compensate for truly cold temperatures and incoming hot air will be most uncomfortable as well as ruining any temperature-controlled processes in the hoods.  Finally, the makeup air design should also compensate for door openings and closings.  Opening and closing a door shouldn't disrupt the hood face velocity.  Be alert to these issues and make sure they are part of the design; local HVAC engineers rarely design laboratories and they will sweep these issues under the carpet.
 
Richard Clark
Sr. Research Chemist

Bemis Innovation Center

Neenah, WI 54956


From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On Behalf Of Michael Hojjatie
Sent:
Wednesday, September 21, 2011 10:08 AM
To:
DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject:
[DCHAS-L] Fume Hoods


Dear colleagues:
 
 
We are in the process of building a new Laboratory and contemplating between using Dustless Fume Hoods vs. Ducted Exhaust Hoods. We will be using a variety of hazardous chemicals including carbon disulfide, acetonitrile, toluene, benzene, some carcinogenic suspect chemicals, hydrogen sulfide and sulfur dioxide gases.
 
I appreciate sharing your experiences with ductless fume hoods and whether you recommend these type of hoods for hazardous chemical work using the aforementioned chemical examples as well as advantages and disadvantages of these hoods vs. the ducted exhaust hoods (safety concerns, costs, maintenance, etc.)
 
 
Thanks,
 
 
Michael Hojjatie, Ph.D.
R&D director, TKI
   



This email and any attachments may contain confidential and/or proprietary information. If you are not the intended recipient, you are not authorized to read, copy or use the contents of the email or any attachment. If you have received this email in error, please let us know by reply and then delete it from your system.

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