- Purifier HEPA Filtered Enclosures & Purifier Class I Filtered Enclosures User's Manual

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A
ppendix C: Filtered Enclosure Specification
s
• Used in an environment of Pollution degrees 2
(i.e., where normally only non-conductive
atmospheres are present). Occasionally,
however, a temporary conductivity caused by
condensation must be expected, in accordance
with IEC 664.