Labconco Biological Safety Cabinets 34269 Series - Manual (Page 18)

Chapter 3: Getting Started
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Original instructions
Optional Ventus
TM
Canopy Exhaust Connection
Certain applications such as working with odorous products or volatile toxic
materials will require the connection of the biosafety cabinet to an exhaust
system.
Note: The canopy connection, also referred to as a thimble or air gap
connection, allows single or multiple biohazard cabinets to be connected to
an exhaust system. During operation, the exhaust system draws all of the
cabinet’s exhaust air, plus a volume of room air (through the vent in the
canopy) into the exhaust duct. Canopy connections function as a “shock
absorber” allowing the system to function properly during changes in room
air pressure.
For information on selecting a canopy connection, go to Appendix D:
Accessories.
Note: If the research involves the use of toxic compounds or volatile
materials, contact the facility’s safety officer or Labconco to ensure that the
biosafety cabinet and its exhaust system are compatible with the materials
you will be working with.