UL 2021:2013

Summary of Topics

The new Third Edition of the Standard for Fixed and Location-Dedicated Electric Room Heaters, UL 2021, is being issued with the following:

• Addition and revision of requirements to relocate component standard references from Appendix A into the body of the standard as component requirements.
• Deletion of obsolete asbestos wire and reference to asbestos material.
• Additional requirements for switches serving as disconnect means of fixed electric room heaters.
• Field mounting of heating elements.
• Revision to include an exception to the audible/visual alarm requirement for heaters that employ certain types of over-temperature limit controls.