If you could confirm that this is still in NFPA 45 I would like to know, one way or the other.

Dan

On Wed, Mar 19, 2014 at 10:13 AM, Daniel Crowl <crowl**At_Symbol_Here**mtu.edu> wrote:

Look at this NIH policy document on ductless hoods. It is from 2005. That is where I got the NFPA reference for NFPA 45. It is section 6.4.1.

http://www.ors.od.nih.gov/sr/dohs/Documents/DOHS%20Ductless%20Fume%20Hoods%20Review_2007.pdf

Dan Crowl

Michigan Tech

On Tue, Mar 18, 2014 at 4:59 PM, Richard W. Denton <rwdenton3**At_Symbol_Here**gmail.com> wrote:

Hi everyone:
I was asked by my department to assist in deciding whether to purchase ductless fumehoods for our undergraduate chemistry labs. We are planning to use these for flammable solvents, and reactions involving HCl and NaOH. These hoods will be used by undergraduates for research also. Any input on the safety issues involved with these equipments versus the regular hoods would be appreciated.
-Richard (CHO)