Gentek 3980400 - Manual (Page 43)

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Chapter 5: Using Your Filtered Enclosure and Appropriate Application
Consult a Labconco Technical Specialist for estimated saturation
life. See Chapter 6 for an example of estimating saturation life.
Another source is the Labconco chemical guide for carbon filtered
enclosures.
Prohibited Acid Use
The Purifier HEPA and Purifier Class I filtered enclosures
motorized impeller cannot be exposed to acids. Where
applications require the use of acids, a separate ventilated
enclosure or vented fume hood should be used with a remote
blower ducted to the outside.
No exceptions are permitted, as the impeller life span will be
limited with acid use.