From: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
Subject: Re: [DCHAS-L] Hood shut down
Date: Mon, 30 Mar 2020 15:30:53 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 9AEF2886-E5ED-4589-8448-5C8EF8C09EBC**At_Symbol_Here**keene.edu
In-Reply-To <007201d606a7$728915a0$579b40e0$**At_Symbol_Here**verizon.net>


> In the (unlikely) event you have 4 ACH with the hoods off then the ducts will act as stacks and suck in air from the outside.

There are many class labs that are likely to have ACHs that are much higher than 4, if there is more than one hood per 500 square feet of floor space. I agree that turning hoods off entirely may not be appropriate, but if the chemicals are not being used and appropriately stored, there are likely to be opportunities to reduce air flow in many hood settings. We have reduced our air flow in our hoods significantly in our two class labs.

- Ralph

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

ralph.stuart**At_Symbol_Here**keene.edu

---
For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org
Follow us on Twitter **At_Symbol_Here**acsdchas

Previous post   |  Top of Page   |   Next post



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.