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Electric Heaters

Voluntary Standard(s)

UL 1278, 4th Edition

Standard for Movable and Wall-or Ceiling-Hung Electric Room Heaters

Relevant Rulemaking



To work with UL to address hyperthermia deaths caused by portable and room heaters

Letters and Comments

While investigating heaters with thermally damaged plugs from different manufacturers, U.S. Consumer Product Safety Commission (CPSC) technical staff[ found inconsistent crimping, welding and/or soldering on the crimp connectors of the heater plug blades.  Staff’s evaluations included x-rays and CT scans of incident and exemplar heater power cord attachment plugs, which showed inconsistencies on the crimps of the plug crimp barrels to the power cord conductors and/or welding or soldering of the plug connections. 

CPSC staff letter to UL on Heater Power Cords - March 7, 2022


Report an unsafe product