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Standard 555, Edition 7

Standard for Fire Dampers

UL Red Line
Standard 555, Edition 7 Edition Date: October 21, 2016
Summary of Topics s0555_7_sum.html

Summary of Topics

This revision of ANSI/UL 555 is being issued to include requirements for Long Term Holding Test and to expand the range of temperature permitted for conducting the Dynamic Closure Test.

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