UL 2021
Original price was: $998.00.$499.00Current price is: $499.00.
Fixed and Location-Dedicated Electric Room Heaters
Underwriters Laboratories , 09/30/2015
Fixed and Location-Dedicated Electric Room Heaters
UL 2021
1 Scope
1.1 These requirements cover fixed and location-dedicated electric room heating equipment rated 600 volts or less to be employed in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70.
1.2 These requirements do not cover movable heaters, wall- or ceiling-hung heaters, baseboard heaters, duct heaters, central-heating furnaces, fan-coil units, panel- or cable-type radiant-heating equipment, electric boilers, or any other electric heating equipment or appliances that are covered in or as a part of separate, individual requirements.
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UL 2021
Original price was: $286.67.$143.00Current price is: $143.00.
Fixed and Location-Dedicated Electric Room Heaters
Underwriters Laboratories , 01/30/2013
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.
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