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Figure 4.

Thimble unit for ducting a Class II, Type A BSC.

Note: There is a 1" gap between the thimble unit (D) and the exhaust filter housing (C), through which room air is exhausted.

A. balancing damper
B. flexible connect to exhaust system
C. cabinet exhaust HEPA filter housing
D. thimble unit
E. BSC

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Last Modified: 1/2/97
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