Labconco Biological Safety Cabinets 30468 Series - Manual (Page 34)

Chapter 4: Performance Features and Safety Precautions
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Original instructions
Chem-Zone TM Directly Exhausted Work Zone
Unique to the Axiom is the Chem-Zone, a directly exhausted work zone. The
central portion of the work surface is surrounded by grilles on the sides, front
and back. Air entering these grilles is drawn to the Exhaust HEPA filter, and
when the cabinet is connected to an exhaust system, out of the laboratory.
This feature prevents the recirculation of volatile chemicals as seen in Type
A cabinets, while exhausting much less air than Type B2 models. This is
illustrated in Figure 4-4.
Figure 4-4