From: "Glode, Andy" <andy.glode**At_Symbol_Here**UNH.EDU>
Subject: Re: [DCHAS-L] Annual Certification Parameters for Fume Hoods w/Face Velocity Reduced to 80 fpm...
Date: Thu, 4 Oct 2018 18:03:50 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 1538676230645.15018**At_Symbol_Here**unh.edu
In-Reply-To
In my opinion, the starting point has to be the ASHRAE 110 test, not a general range of acceptable face velocities. When we have reduced flow rates as a result of a building energy recommissioning projects, we perform ASHRAE 110 tests for each affected hood.
Once a hood passes the ASHRAE 110 test, we use the face velocity recorded during the successful ASHRAE 110 test as the baseline for future tests.. Our acceptance criteria for hood face velocity for periodic hood tests (at least annual) thereafter is no lower
than 10% below the baseline and no greater than 20% above baseline, which is from the ANSI Z9.5 Laboratory Ventilation Standard.
I hope this helps.
Andy
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