I am not in associated with University or College but our Petrochemical Complex has a huge organic Laboratory and we use simple formula for DUCTS / hoods and that is, we maintain 12 cycles of volume per hour in the hoods it means that we calculate the volume of the hood and then install a induced draft fan on the hood that gives us twelve times the volume flow rate per hour from the hood exhaust. I hope it helps Rasim M Qureshi SHE Engineer -----Original Message----- From: Mary Dougherty [mailto:mdough**At_Symbol_Here**STANFORD.EDU] Sent: Thursday, September 09, 2004 9:44 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: [DCHAS-L] Level of Fume Hood Use at Academic Institutions Stanford University EH&S's Department is seeking information regarding the level of fume hood use at other academic institutions in undergraduate organic Chemistry teaching laboratories. We'd appreciate your feedback on the following: 1) Name of your University or College 2) Do you run microscale organic chemistry labs or macroscale organic chemistry labs? 3) What is the percentage of organic chemistry experiments conducted in a fume hood vs on the benchtop? (e.g., We run 100% of our organic experiments in the fume hood; or, We run microscale organic experiments primarily on the benchtop - chemicals are dispensed in the hoods). 4) Student-to-fumehood ratio & length of hood (e.g., 2 students per 5 foot hood ; Or, 5 students rotate using 6 foot hoods). 5) If applicable, does lack of fume hoods impact your curriculum? If so, how? (e.g., Reduce the labs sections offered per quarter; Or, Use of substandard aqueous procedures, or shortened procedures allowing rotating use of hoods.)
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