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 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. 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 LLCOffice: 781.879.1222
FAX: 781.879.1202
Mobile: 508.934.9382
Address:
35 Hartwell Avenue
Lexington, MA 02421-3102TIAX, "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>
ToDCHAS-L**At_Symbol_Here**LIST.UVM.EDU cc SubjectRe: [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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