UL 2201 PDF
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Carbon Monoxide (CO) Emission Rate of Portable Generators
1 Scope
1.1 This standard describes the testing procedures and requirements applicable in determining the carbon monoxide (CO) emission rate of a portable generator and also testing procedures and requirements applicable in determining the shutoff capability of a portable generator in elevated carbon monoxide (CO) environments.
1.2 These requirements apply to spark-ignited engines installed in portable generators for each fuel type recommended by the manufacturer.
Summary of Topics
This revision of ANSI/UL 2201 dated February 24, 2023 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS). No technical changes have been made.





