From: "Secretary, ACS Division of Chemical Health and Safety" <secretary**At_Symbol_Here**DCHAS.ORG>
Subject: [DCHAS-L] ANSI/AIHA Z9.5 2012 Laboratory Ventilation Standard Fume Hood Minimum Airflow Survey
Date: February 11, 2013 2:30:18 PM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <CCA0E727-188E-4D2F-9910-E15FF504EF98**At_Symbol_Here**>

ANSI/AIHA Z9.5 - 2012 Laboratory Ventilation Standard
Fume Hood Minimum Airflow Survey

Dear Industry Professional

This past Fall, the revised ANSI/AIHA Z9.5 - 2012 Laboratory Ventilation Standard was finally published, with particular attention focused on setting the minimum airflow rate through a fume hood.

Until now, current guidance has traditionally relied on NFPA 45 and its recommendation to achieve 25 cfm/ft2 (457 m3h/m2) of fume hood work surface area. Industry experts realized that this one volumetric requirement for all fume hoods and their associated operations was not proper - a range of flows, in particular, interior air change rates (ACH) should be applied.

In 2011, NFPA deleted its recommendation from their NFPA 45 Standard, and referred the concern back to ANSI. Within the Z9.5 revision, there is now a recommended, non-binding ACH range (150-375), not a specific value. The standard puts the requirement back on industry and its health and safety teams to assess the potential hazards.

The change could have a significant impact on lab environments and resulting energy footprints. We are requesting your input through this brief survey to gauge the extent to which you and/or your site teams might be adopting the new guidance, and if there is a specific value (ACH or CFM/ft2) you will establish for your fume hoods.

For those who respond to the survey, we will collect the data and send you a summary of the findings. The survey results are purely used to gauge the impact of this revised standard and assist all organizations in establishing peer guidance, not for resale or marketing purposes.

Please click on the following link to respond to the survey and reply with your responses by February 28th

Your input is greatly appreciated!

David A. Rielly, CEM, LEED GA
Global Energy Manager
Global Health, Safety and Environment
Novartis Institutes for BioMedical Research, Inc.
Cambridge, MA 02139

Office +1 617.871.4414
Mobile +1 617.301.2113

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
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.