![header thumbnail](/images/publishers\ul_cover.gif)
UL 555C:4ED 2014-12-16
Current
The latest, up-to-date edition.
![header thumbnail](/images/publishers\ul_cover.gif)
Ceiling Dampers
Hardcopy
16-12-2014
Foreword
Introduction
1 Scope
2 General
Construction
3 Components
4 Corrosion protection
Performance
5 General
6 Fire-endurance test
7 Closing reliability test
8 Dust loading test
9 Salt-spray exposure test
10 Spring closing force test
11 Metallic coating thickness test
Manufacturer's instructions
12 Installation instructions
Marking
13 General
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