From: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
Subject: Re: [DCHAS-L] Fume Hood Testing ASHRAE 110 - NIH modified
Date: Thu, 1 Feb 2018 13:37:18 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 65605BCD-BAF9-40F2-9658-070865023E6C**At_Symbol_Here**
In-Reply-To <4fb161d2879f496c9529cad08f4eacec**At_Symbol_Here**>

>Can you all let me know whether you request NIH modifications for fume hood testing and if so, do you actually receive both static and dynamic elements of the tests? Do you know of any companies that actually do the dynamic portion of the test?
Good question. My experience is that NIH's design standards don't translate well outside that institution because they rely on a level of engineering and mechanical expertise that is often not available outside NIH headquarters. Finding a contractor who is willing to accept the perceived additional liability associated with changing their standard practices can be a challenge.

For example, I had experience with the question you raise at a previous campus while commissioning a relatively small lab building (14 hoods). The contractor did an informal version of the NIH modification on one hood to convince me and himself that the hood design for this building passed the dynamic aspect of the test. These hoods were built like a tank and it would have taken a hurricane in the lab to disrupt containment, so we decided to stick with the standard ASHRAE protocol for that building.

Others on the list have commissioned many more hoods on that campus than I have, and I don't know if they are continuing to follow that practice or not.

- Ralph

Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859


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