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Chapter 5: Using Your Filtered Enclosure and Appropriate Application
• Arrange for minimal disruptions, such as room traffic or
entry into the room while the enclosure is in use.
Start-up
• Turn on exhaust system and accessory light.
• Only raise the sash for loading and cleaning.
• Check the baffle air slots for obstructions.
• Allow the enclosure to operate unobstructed for 1 minute.
• Wear a long sleeved lab coat and rubber gloves. Use
protective eyewear. Wear a protective mask if appropriate.
Consult your Safety Officer for additional personal
protective equipment recommendations.
Loading Materials and Equipment
• Load only the materials required for the procedure. Do not
overload the enclosure.
• Do not obstruct the air foil, or rear baffle slots.
• Large objects should not be placed close together and
should be elevated above the work surface to permit
airflow to sweep under the equipment.
• After loading, wait one minute to purge airborne
contaminants from the work area.
Work Techniques
• Keep all materials inside the lower air foil, and perform all
contaminated operations as far to the rear of the work area
as possible.
• Segregate all clean and contaminated materials in the work
area.
• Avoid using techniques or procedures that disrupt the
airflow patterns of the enclosure.
Final Purging
• Upon completion of work, the enclosure should be allowed
to operate for two to three minutes undisturbed, to purge
airborne contaminants from the work area before shutting
down the blower.
Unloading Materials and Equipment
• Objects in contact with contaminated material should be
surface decontaminated before removal from the enclosure.
• All open trays, weigh vessels or containers should be
covered before being removed from the enclosure.