Providing services that help make The University of Memphis

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Environmental Health and Safety
Providing services that help make The University
of Memphis a safe and healthful place to learn
and work
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Laboratory Ventilation Exhausting Work
Dont be baffled by it .
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VAV System
Damper Actuator
Outside Air
Sash Sensor
Illustration Courtesy Exposure Control
Technologies, Inc.
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Strobic exhaust fan draws fumes out of the lab
via ducts.
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Phoenix valve maintains constant hood face
velocity at any sash height.
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Face Velocity Meter
Normal face velocity is 100 fpm Standby face
velocity is 60 fpm
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Status Lights
Lights indicate normal operation of the fume
hood. If hood is safe to use, one of these must
be illuminated.
Zone Presence Sensor automatically shifts system
between normal and standby modes.
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Zone Presence Sensor
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Energy Waste Alert
Yellow light and audible alarm indicate sash is
open and room lights are off. Close the sash!
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Caution Flow Alarm
Red light and audible alarm will warn of unsafe
air flow.
Immediately close sash, leave the area, and call
2699 to report malfunction. Do not use the hood!
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Emergency Switch
Push on to increase face velocity during a major
hazardous material release. Push off to return
to normal operation.
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Emergency Exhaust Indicator
Red light and audible alarm indicate hood is in
emergency exhaust mode. Note face velocity
increase.
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Mute Switch
Push to silence audible alarm. Status lights
will remain illuminated until status reverts to
normal.
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Use your ventilated storage cabinets
appropriately. Separate chemicals by
compatibility, and provide secondary containment
within the cabinets.
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Be good to your hood!

• Keep it clean
• Protect radiochemical hoods from corrosion
• Read the owners manual

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Tips for Safe Hood Use

• Confirm that the hood is working before you use
  it
• In case of hood failure, stop work in the hood,
  close the sash, and leave the area
• Keep the sash at or below the level indicated by
  the arrows
• Keep all apparatus and materials at least six
  inches from the fume hood face
• Elevate apparatus off the hood work surface

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Tips for Safe Hood Use

• Keep slots in the back of the fume hood
  unobstructed
• Minimize storage of chemicals in the hood
• Keep the head and upper body out of the hood
• Minimize traffic crossing the hood face
• Approach the hood from the front

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Tips for Safe Hood Use

• Withdraw hands and arms slowly
• Open and close the sash slowly
• Keep the sash closed when not actively using the
  hood

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The End