UL 641-10 Standard for Type L low-temperature venting systems
Publication Year
2010
Document Status
Current
Abstract
Specifies factory-built vent piping and fittings constructed to provide venting systems for use with gas and liquid fuel-burning appliances that exhaust low-temperature flue gases.
Document History
Revised October 20, 2022.
Publisher Information
Underwriters Laboratories
Established in 1894 as the Underwriters' Electrical Bureau, UL is a global safety consulting and certification company, approved to perform safety testing by the U.S. federal agency of Occupational Safety and Health Administration.
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