Browse & Buy UL Standards
Standard 2166, Edition 3

Standard for Halocarbon Clean Agent Extinguishing System Units

UL CSDS Proposal
Standard 2166, Edition 3 Edition Date: July 20, 2018
Summary of Topics b2166_3_20180720_sum.html

Subject 2166

Bulletin Dated: July 20, 2018


The following changes in requirements to the Standard for Halocarbon Clean Agent Extinguishing System Units, UL/ULC 2166, are being proposed for preliminary review and comment only:

1. For Preliminary Review Only: Automatic and manual systems

2. For Preliminary Review Only: Exception for the one-year time leakage test addition

3. For Preliminary Review Only: Extinguishing System Units for Protection of Volumes less than 100 cubic meters

4. For Preliminary Review Only: Clarification to UL/ULC 2166 for consistency with UL/ULC 2127

5. For Preliminary Review Only: Aging Tests - Plastic Materials

6. For Preliminary Review Only: Air oven aging test of plastic materials

Back to Standard 2166, Edition 3

The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.

You will be able to choose your purchase options on the following pages.


You have one or more subscriptions that will expire soon.


You have one or more licenses to assign


Additional information required

To serve you better, please update your account details.