Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 40)

Product Service 1-800-522-7658 40
The Inlet Relief Valve located on the top of the cabinet is
designed to draw a maximum of 100 CFM (2.83 m
3 /m).
Attempting to draw additional room air through the valve
(room air exhaust), can result in unstable cabinet
operation.
If additional room exhaust is needed to be
drawn through the exhaust system, install an
additional duct and balancing damper
downstream of the cabinet’s damper. This will
allow for proper balancing of the system.
Figure 2-1c
Figure 2-1d