Red Line
July 27, 2016
UL 441
UL Red Line
Edition 11
Published Date: July 27, 2016
Last Revision: April 02, 2024
Scope
004410-000000-0000001 Scope
1.1 These requirements cover Types B and BW gas vents and Types B and BW gas vent roof jacks intended for venting gas appliances equipped with draft hoods to burn only gas. Type B vents are also intended for use with other Category I appliances that specify they are for use with Type B gas vents.
1.2 The gas vents covered by these requirements are intended for installation in accordance with the National Fire Protection Association Standards for Chimneys, Fireplaces, Vents, and Solid-Fuel Burning Appliances, NFPA 211 the National Fuel Gas Code, NFPA 54, the Department of Housing and Urban Development Mobile Home Construction and Safety Standards, Chapter II of 24 CFR, Part 280, the International Mechanical Code, and the Uniform Mechanical Code.
Summary of Topics s0441_11_sum.htmlSummary of Topics
This revision to ANSI/UL 441 includes updates to obsolete code references. The revisions also address other miscellaneous universal upkeep of UL for Standards Safety. These revisions are considered to be non-substantive and not subject to UL's STP process.
Back to Standard 441, Edition 11