As another poster mentioned, the ASHRAE 110 test is the most reliable way to determine if the hood is containing properly, but before you spend all that money a simple test with a smoke pencil may be enough to demonstrate there is a problem with turbulace-induced leakage and that you need to lower the velocity.  If I were to do the ASHRAE test, I would wait and do it after the modifications to make sure I was presenting the client with a reliable hood.   

W.    

Wayne Wood | Environmental Health and Safety |McGill University | 3610 rue McTavish Street, 4th floor | Montreal, Quebec, Canada, H3A 1Y2 | Tel: (514) 398-2391

From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu]On Behalf Of Penny Manisco
Sent: Tuesday, June 30, 2015 11:55 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Fume hood face velocities

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