<
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>The limitations and benefits of ductless fume hoods have been discussed in
this forum from time to time, and I think there's a way to access those di
scussions. (If anyone can say how exactly, please chime in.) Dear colleagues: <
span style="font-size:11.0pt;font-family:"Calibri","sans-s
erif";color:#1F497D">We are in the process of building a new Laborator
y and contemplating between using Dustless Fume Hoods vs. Ducted Exhaust Ho
ods. We will be using a variety of hazardous chemicals including carbon dis
ulfide, acetonitrile, toluene, benzene, some carcinogenic suspect chemicals
, hydrogen sulfide and sulfur dioxide gases. I appreciate sharing your experiences with ductless f
ume hoods and whether you recommend these type of hoods for hazardous chemi
cal work using the aforementioned chemical examples as well as advantages a
nd disadvantages of these hoods vs. the ducted exhaust hoods (safety concer
ns, costs, maintenance, etc.)
Thanks, <
/span> Michael Hojjatie, Ph.D.
R&D direct
or, TKI
With the list of materials you've named, and the fact that you are bu
ilding a new lab, I think ducted exhaust is the only way to go in this situ
ation. This is not a group of chemicals you want to blow back into th
e lab should a ductless hood work less than perfectly. I'm not even s
ure if there is a sorbent cartridge available that would capture everything
on your list.
;
;
; Don
Donald Abramowitz
Environmental Health & Saf
ety Officer
Bryn Mawr College
Bryn Mawr, PA