[labnetwork] Face Velocity for Wet benches/Fume hoods?

[Joe Morgan]

Mac,

 

See ANSI/AIHA Z9.5 for laboratory ventilation systems and worker health.
In the past 100 feet/per minute has been the golden rule.  However, for
a number of years now fume hood manufacturers have created new designs
that sometimes enable sash velocities as low as 60 feet/minute.  The
hood must still pass testing and certification as defined by ASHRAE 110.
I'm not sure how wet process benches or laminar flow hoods fit into
these standards.

 

Best, Joe

 

From: labnetwork-bounces at mtl.mit.edu
[mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Mac Hathaway
Sent: Thursday, April 05, 2012 3:09 PM
To: Lab Network (labnetwork at mtl.mit.edu)
Subject: [labnetwork] Face Velocity for Wet benches/Fume hoods?

 

Hey all,

What do folks currently consider satisfactory regarding the air-flow
face velocity at their fume hoods and wet benches?  Do you have any
ASHRAE/ANSI/SEMI-type standards or references that you draw on for this
purpose?

The topic came up today in the context of energy savings, lab make-up
air, and this sort of thing...


Thanks,

Mac Hathaway
Harvard Center for Nanoscale Systems

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